These Oxygen Absorbing beer bottle caps have a special liner that absorbs oxygen in the bottle's head space. This helps reduce the oxidation that happens during the bottling process, keeps your home brewed beer tasting fresher, and can extend it's shelf life.

26 mm diameter caps fit American bottles. Some imported bottles and some sparkling wine bottles use a 29 mm cap instead. We recommend test fitting prior to filling if you're re-using an imported bottle.

Important to note: It is recommended that you only sanitize as many caps as you'll require at the time of bottling. The oxygen-absorbing agent is activated when the cap gets wet. If wetted caps are saved for later use, they'll still function as a normal cap, but the oxygen absorbing agent may be depleted.

 

  • Gold caps are the competition standard, so invest in these if you are entering your beer
  • Prevents oxidation and off flavors, sealing in more ideal traits
  • Every beer has tasted fresh as can be
  • 5 stars: 75 (89%)
  • 4 stars: 8 (10%)
  • 3 stars: 1 (1%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
D
Dave
Great Bottle Caps

These are my standard cap. No issues solid choice.

m
mtpokit
they work well

but i've noticed a reduction in cap metal thickness and the seals are not as nice as the older stock. i haven't had any fail that i know of and will continue to use with spot checks under water for leaks.

P
Patrick O.
Great Caps

These work great and the price is very reasonable.

S
Stephen L.
Only caps I use!

Buy these in bulk and save yourself the headache of running out (I bought 2000!). While bottling I put them in a dish with vodka. That keeps them ready to hit any over-spill that may accumulate at the mouth of the bottle. Gold caps are the competition standard so invest in these if you are entering your beer in contests.

J
Justin F.
Get some they are caps they work

I get the oxygen absorbing caps for longer aging beers but these work fine for something you're going to drink real soon!

R
R A.
Bottle cap

Works great as a bottle cap not sure if the oxy absorption makes any different (have read people swear by them). Had to try them and they worked as a bottle cap.

D
David M.
Ideal for bigger beers and aging.

Prevents oxidation and off flavors sealing in more ideal traits. My homebrew with these caps are slightly better. Remember IPA's and anything under 7%abv will not keep long or age well. Author Joshua Bernstein has great advice on beer aging.

L
Lester M.
great choice for caps

Great price. I bottle condition and have had no issues.

D
DallasGreg
Perfect

Great for absorbing the 02 in the head-space of your freshly bottle brews!

P
Philip D.
Great!

These are the only caps I have used and they work great.

S
Stephen M.
Work Great

Caps work like a charm; no problems whatsoever.

P
Paul K.
These caps probably make your beer better.

I haven't tested these Oxygen Absorbing Bottle Caps against regular caps but they probably prevent beer that's been sitting around too long from tasting stale. Why not give your beer it's best shot at tasting great. Plus they're shiny.

e
ewall156
Best price I have found

Picked these up in store for a great deal. Adding shipping when buying elsewhere in bulk adds up to a bit more than this. Consistent and they look good.

L
Larry E.
Good caps

I like these because they absorb oxygen when wet and are inexpensive. I label my beer by writing on the caps with a industrial sharpie.

J
Justin
The Caps to End all Caps

They are bottle caps no more no less. Good deal on this quantity.

M
Manfred G.
They have a perfect seal

My only issue is that visually they look like they're not perfectly circular more oval after capping. I use a really good bench capper that I purchased from MoreBeer so I don't think it's the capper.

D
DMFCB750
Good caps great price

If you are a fan of live ales you have to bottle. If you want to repitch yeasts bottling is the way to go. I believe this is a good value for a great product.

A
Andrew M.
My favorite cap

I've tried caps from the competitors but these work the best for me. Also nicely priced.

r
robert s.
gets the job done

Nothing fancy but they work great and the price is right. I don't see the need for more expensive caps

C
Craft B.H.
No Problems

They go on just fine. I have not had any problems with leaks or oxidation.

p
paul s.
great product

easy to clean and works great if you are bottling

J
Jabe H.
Cap It!

Great deal on caps! I just dunk them in sanitzer for a bit then rock and roll!

C
C R.
Haven't had a leak

Using these caps I haven't had a leak. They seal well and are a good price in bulk.

b
ben y.
highly recommend

I only use oxygen absorbing caps when I bottle. Why chance it? Ive never had a problem with oxidation in 16+ batches so far. Every beer has tasted fresh as can be.

C
Charles A.
Standard Competition Caps

Use these for homebrew competitions

C
Chris R.
No complaints

Good quality cap no problems worked as expected and would order again.

A
Andrea K.
Worth It!

I was a bit doubtful about whether these caps would really change much but figured I would give them a try. I liked the fact that they had the thicker inner seal as mentioned by a reviewer above. Also we have found since using these that the incidence of having a slight estery or metallic smell that we would occasionally get when opening a bottle (even though the beer tasted fine) has really reduced.

J
Jeff M.
Good Caps

They do their job without complaint.

E
Ernest C.
Worth the piece of mind

I'm not sure if I would have issues with my bottling process but using these oxygen absorbing caps is inexpensive insurance. Never had a capping issue with these.

G
Griffs B.
Great bulk caps

Caps perform well. No issues with bite to the bottle lip and carbonation is always solid. Will be buying more!

b
beermonkey
Competition Bottling

What I use for my competition beers to avoid any chance of oxidation. Soak in some Star San right before you pop them on the bottle.

S
Stephen M.
Great Caps

Bought these for my second batch of bottled beer. I bottled a Belgian Pale with this caps and they seem to be aging better with less oxidation than regular caps. Will buy these again.

A
Andrew F.
Its a bottle cap and does its Job - decent price

performs as it should for a decent price.