750 ml amber-colored glass bottle with flip-top (Grolsch-style) stopper system made of metal, polymer, and plastic. The bottles are 11-7/8″ tall, or 12-3/8″ with the lids on.
Please note: when using the bottles for any product that will be under pressure (water kefir, kombucha, beer, lacto-fermented soda, etc.) be sure to check the bottle for cracks prior to each use as cracks will weaken the integrity of the bottle. We also recommend “burping” the bottles periodically to relieve excess pressure.
“This works great for fermented products which need to build pressure for fizzy drinks.”
“When I started making water kefir soda, I ordered two of these bottles. Then I bought two “similar” bottles at a local store. The Grolsch bottles make bubbly water kefir, but the store bought ones don’t! My only regret is that I didn’t order six of these right from the start! The top stays so tight that it is tough to open, but this is precisely why it works so well. To make it easier to flip, I wrap a towel or a piece of rubbery shelf liner over the top to help me get a good grip.”
“I use these bottles for my constantly cycling water Kefir. I’m glad I got 3 of them. They keep an absolutely tight seal and after I pour off the kefir into them I just let them sit on the counter and continue to age and develop more fizz and healthy bacteria. This way I can keep a new batch brewing all the time and easily control the completed batches. I highly recommend this bottle system.”
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Q. These seem great, but out do you wash them out?
A. A thin scrub brush generally works. Kitchen supply stores often have these as do beer/wine making supply stores. They also generally get reasonably clean in a dishwasher.
Q. Do these come with the metal part attached or does it need assembled?
A. The grolsch bottles are fully assembled when you get them.
Q. I already have a few of this type of bottle but some of them do not have the rubber washer that fits around the ceramic stopper. Do you sell that single part separately or know where I can find it?
A. We don’t sell these parts separately, but you should be able to find it at a store that sells supplies for beer and wine making.
Q. How much is 750ml in cups or oz? I just don’t have metric internalized like that, to know if they are the right size for me!
A. 750 ml is 25.5 ounces – a little more than 3 cups.
Q. Are these bottles sturdy enough to bottle homemade ginger beer from ginger beer plants? I like to have them sit on the counter for a couple of days to get the carbonation level I like. They won’t explode, will they?
A. These bottles are very sturdy. They are the same type of bottles used to bottle beer, kombucha, and other carbonated beverages. As with any fermented product, you should exercise caution when storing the bottles for a long time at room temperature, but several days should be fine.