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38mm Poly Seal Screw Caps (fits most 1/2 & 1 gallon jugs) [Bag of 12]

4.6 4.6 out of 5 stars 1,711 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Lab Cap Plugs by Home Brew Ohio

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Purchase options and add-ons

  • 12 Count
  • Reusable

Additional Details

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Customer ratings by feature

Easy to remove
4.5 4.5
Easy to clean
4.4 4.4
Value for money
4.3 4.3

Frequently bought together

$7.69 ($0.64/Count)
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$59.99 ($7.50/Jug)
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$8.99 ($0.75/Growler Cap)
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Product Description

These 38 mm poly seal screw caps fit our 1/2 and 1 gallon jugs that we carry. The poly cap will not rust over time.

Product information

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38mm Poly Seal Screw Caps (fits most 1/2 & 1 gallon jugs) [Bag of 12]


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WARNING:

CHOKING HAZARD -- Small parts. Not for children under 3 yrs.

Customer reviews

4.6 out of 5 stars
4.6 out of 5
1,711 global ratings

Customers say

Customers like the performance and seal of the bottle cap. For example, they mention that it works well, the little plastic insert helps seal the lid, and that the inner poly seal can be removed for easier cleaning. That said, opinions are mixed on quality, fit, value, ease of cleaning, and leakage.

AI-generated from the text of customer reviews

89 customers mention77 positive12 negative

Customers like the performance of the cap. They mention that it works well, is better than OME caps, and works well on wine bottles. Some say that the product is handy and a great add-on item.

"...with his answer as I am very pleased with the fact these caps do work very well on the newer style GT bottles, and I've not had a problem with them..." Read more

"Work better than OME caps that come on 1 gallon carboys!!" Read more

"...09-10-2015 Have used these for a couple batches of kombucha. They work very well on my old style GT's bottles,..." Read more

"These were exactly as described. Worked perfectly with our bottles." Read more

67 customers mention50 positive17 negative

Customers like the seal of the lab supply. They say it seals very well, has a little plastic insert that helps seal the lid, and the inner poly seal can be removed for easier cleaning. Customers also say the seal is airtight and the plastic seal on the inside pops out easily to clean. They look nice and have a thick inner silicone like seal.

"Great caps. Seal is very tight, great for wine and mead!" Read more

"...They seal OK and allow a moderate amount of fizz to build up in the brew...." Read more

"...These were a perfect fit and made of good materials. The inner poly seal can be removed for easier cleaning if needed...." Read more

"...They can be used again, but the seal is definitely compromised. Once the growler is opened, you're committed...." Read more

17 customers mention12 positive5 negative

Customers like the ease of removal of the lab supply. They say it screws on and off very quickly, seals the jug tightly, and is easy to grasp on and re-install. Some say the plastic insert is easily removed and the caps seem to thread on to the bottles well.

"...The caps seemed to thread on to the bottles well. They are plastic and havent really used them, so I cant really speak much as far ad durability...." Read more

"...The plastic seal on the inside pops out easily to clean and re-installs easily as well." Read more

"...I drank it today. The lid was impossible to remove without pliers and the kombucha was only mildly carbonated as compared to the one I drank..." Read more

"...That makes these into single use caps. Too bad, they are easy to put on and seal well." Read more

162 customers mention97 positive65 negative

Customers are mixed about the quality of the lab supply. Some mention that it's well made, robust, and will last a long time. However, others say that the caps break easily and can actually be broken just over tightening the cap.

"...The caps didn’t break when I tightened them, I was even able to use a gripper to get an extra turn for that second ferment!..." Read more

"...~~ NEW style GT bottles: Because the screw-threads are a little closer together and configured a bit differently than the previous style bottles,..." Read more

"...Growlers are not the best for long-term storage but awesome for a few days! We use it for Kombucha and holds better than beer does...." Read more

"Great caps. Seal is very tight, great for wine and mead!" Read more

148 customers mention100 positive48 negative

Customers have mixed opinions about the fit of the cap. Some mention that it fits perfectly, while others say that it doesn't fit the jugs advertised for.

"...They fit all the standard GT and Kevita kombucha bottles (16oz and 64oz) as well as the generic 12oz bottles I bought on here!..." Read more

"...These were a perfect fit and made of good materials. The inner poly seal can be removed for easier cleaning if needed...." Read more

"...& A's for this product, one gentleman posted that these caps do not fit the new-style Dave's GT kombucha bottles...." Read more

"...I have checked these caps on my growlers and they do fit very well...." Read more

40 customers mention20 positive20 negative

Customers are mixed about the value of the lab supply. Some mention it's great value and works great on cheaper 1 gallon bottles, while others say it'll be a waste of money. They also say it seems very spendy when you have to pay about the same for shipping. Some customers also say the product is not as advertised and is of cheap quality.

"...They are well worth the money...." Read more

"...Unfortunately, these caps only led to frustration and disappointment for my use, which is to seal kombucha for 2nd fermentation in reused GT's 16 oz..." Read more

"...They have all held up well with this treatment for months now. Great price for so many. I will order more of these when I need them." Read more

"The product is fine, but it's a bit expensive. For some reason I thought this was the same item as the caps with 12 in them, but its not...." Read more

28 customers mention19 positive9 negative

Customers are mixed about the ease of cleaning. Some mention that it's easy to sanitize, washable, and reuse, while others say that it is almost impossible to clean, has liquid underneath it, and is unsanitary in the long run.

"...These plastic lined caps are made to be reused and easy to clean. I'm pretty happy with them so far." Read more

"...I don't need these caps to keep fizz in, just to keep my water clean, and they have stayed clean...." Read more

"...stuck behind the clear plastic underneath the cap, which is unsanitary in the long run because that can eventually grow mildew...." Read more

"...I tried that (it seemed great at first - a better fit and easier to clean, BUT it no longer had the correct seal and it will leak." Read more

27 customers mention10 positive17 negative

Customers are mixed about the leakage of the lab supply. Some mention that it fits their growlers and does not leak, while others say that it leaks under the space in the cap and stays there. The fit is not properly, and liquid evaporating from the jugs.

"...the inner plastic piece traps the liquid underneath it so I never feel like it is clean...." Read more

"...of batches and the carbonation is totally contained - nothing can leak through the sides of these caps. I am now getting super fizzy (YUM!)..." Read more

"Water gets stuck behind the clear plastic underneath the cap, which is unsanitary in the long run because that can eventually grow mildew...." Read more

"...They do not seal very well and leak. Would suggest purchasing the metal caps with seal instead." Read more

Black plastic poly seal, not white metal caps
5 Stars
Black plastic poly seal, not white metal caps
05-31-2016 Update. Still brewing with these 38mm poly caps, and they still work OK on the old style GT's bottles.They seal OK and allow a moderate amount of fizz to build up in the brew.However, the new style GT's bottles and re-using the new style bottle caps work VERY well.We get incredible fizz build up re-using the new style bottle and caps. (same brew, same batch, just different bottles used for second ferment)Most of the new style bottles have a very noticeable pressure "dome" to the lid and are almost explosive to open. :)You MUST open these outside, or in the kitchen sink if you don't want to be cleaning up a liquid mess.I really enjoy the extra fizz.10-21-2105 Update. These caps are still working well on my old style GT's bottles.Again: these will NOT work on the new style GT's kombucha bottles.I have tried to spread the word to sites like kombucha kamp but have been ignored.09-29-2015 Received another order of 24 as my brewing expands.Note: GT's Kobucha has changed their bottle design. These will NOT fit the new style GT's bottles.The New GT's bottles have GT's embossed on the plastic capI tried to attach a photo.New on the left, old on the right.09-10-2015 Have used these for a couple batches of kombucha. They work very well on my old style GT's bottles,08-19-2015 I just received 24 of these from Glass Bottle Outlet, fulfilled by Amazon.Black plastic with cone shaped inner seal. They fit my old style GT Kombucha bottles perfectly.The Amazon ad shows the black plastic 38mm Poly Seal caps.However - when placing the order, and even now when leaving my review, the white metal caps are displayed in the thumbnail photo.I took a chance and got the black plastic ones displayed on the Amazon page.They appear to be well made and feel like they will seal better than reusing the original plastic GT bottle caps.
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Reviewed in the United States on March 21, 2016
59 people found this helpful
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Reviewed in the United States on May 26, 2023
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5.0 out of 5 stars AIR TIGHT SEAL!
Reviewed in the United States on May 26, 2023
I tried a ton of caps and these ones were the best I found for kombucha brewing! The other ones I bought were not air tight like these!
They fit all the standard GT and Kevita kombucha bottles (16oz and 64oz) as well as the generic 12oz bottles I bought on here! The caps didn’t break when I tightened them, I was even able to use a gripper to get an extra turn for that second ferment! I highly recommend these for any of your needs that require and air tight seal!!
Look no further, these are the ones you want!!
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Customer imageCustomer image
2 people found this helpful
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Reviewed in the United States on January 8, 2024
One person found this helpful
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Reviewed in the United States on January 4, 2024
Reviewed in the United States on February 29, 2024
Reviewed in the United States on August 20, 2015
Customer image
5.0 out of 5 stars Black plastic poly seal, not white metal caps
Reviewed in the United States on August 20, 2015
05-31-2016 Update. Still brewing with these 38mm poly caps, and they still work OK on the old style GT's bottles.
They seal OK and allow a moderate amount of fizz to build up in the brew.
However, the new style GT's bottles and re-using the new style bottle caps work VERY well.
We get incredible fizz build up re-using the new style bottle and caps.
(same brew, same batch, just different bottles used for second ferment)
Most of the new style bottles have a very noticeable pressure "dome" to the lid and are almost explosive to open. :)
You MUST open these outside, or in the kitchen sink if you don't want to be cleaning up a liquid mess.
I really enjoy the extra fizz.

10-21-2105 Update. These caps are still working well on my old style GT's bottles.
Again: these will NOT work on the new style GT's kombucha bottles.
I have tried to spread the word to sites like kombucha kamp but have been ignored.

09-29-2015 Received another order of 24 as my brewing expands.
Note: GT's Kobucha has changed their bottle design. These will NOT fit the new style GT's bottles.
The New GT's bottles have GT's embossed on the plastic cap
I tried to attach a photo.
New on the left, old on the right.

09-10-2015 Have used these for a couple batches of kombucha. They work very well on my old style GT's bottles,

08-19-2015 I just received 24 of these from Glass Bottle Outlet, fulfilled by Amazon.
Black plastic with cone shaped inner seal. They fit my old style GT Kombucha bottles perfectly.

The Amazon ad shows the black plastic 38mm Poly Seal caps.
However - when placing the order, and even now when leaving my review, the white metal caps are displayed in the thumbnail photo.
I took a chance and got the black plastic ones displayed on the Amazon page.

They appear to be well made and feel like they will seal better than reusing the original plastic GT bottle caps.
Images in this review
Customer image
Customer image
17 people found this helpful
Report
Reviewed in the United States on January 8, 2023
Reviewed in the United States on December 25, 2023

Top reviews from other countries

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rycroft
5.0 out of 5 stars Durable
Reviewed in Canada on October 29, 2023
Cliente de Amazon
5.0 out of 5 stars Buenas tapas
Reviewed in Mexico on June 24, 2020
MR C I Horkley
5.0 out of 5 stars Great Value, Perfect For Beer Growlers.
Reviewed in Canada on July 10, 2023
Pakkome
5.0 out of 5 stars Buen producto
Reviewed in Mexico on August 11, 2020
Lau B.
4.0 out of 5 stars Très abordables en prix et bonne qualité
Reviewed in Canada on August 5, 2023
Customer image
Lau B.
4.0 out of 5 stars Très abordables en prix et bonne qualité
Reviewed in Canada on August 5, 2023
Comme je fermente beaucoup et que je produits cidres et vinaigres, je tiens de nombreuses touries. Avec les années ces touries perdent leurs bouchons mais aussi j en achéte beaucoup dans des bazars car il m’en faut beaucoup et souvent les bouchons sont perdus ou pas vendus avec.
Quand on recycle, il manque souvent de quoi pour que ce soit complet. Très bon achat pour moi, ils vont parfaitement sur mes touries .
Très bon rapport, qualité prix.
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One person found this helpful
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