AstroBrew said: I would recommend replacing the gaskets on these before putting beer in them. I got a stash of these from Ikea here in Austin and filled a few with some homebrew. After a few weeks, I popped one and it was great! Nice and carbed and conditioned. After a few more weeks, however, the remaining bottles had gone flat! I am guessing the pressure slowly leaked out of the cheap silicone gasket. I going to get some Grolsch replacement gaskets for them before I put anymore beer in them (if I ever do, they work great for still apfelwein). Click to expand...

I second this recommendation to replace the gaskets. I picked up a half-dozen of these bottles from the Ikea in Elizabeth, NJ just a few weeks ago, and used them to bottle some lager. Tonight, I cracked open my first one to find that it's gone flat because the silicone gasket started to tear from the inside of the ring. Now that I look, three out of the six show the some lacing around the top of the bottle. Thinking about it a little more critically, I can't imagine the silicone would stand up well over repeated sterilizations and carbonations, since it will probably get brittle. I'll be switching out the gasket on one of these bottles for my next batch, to see how it works out.On the plus side, now I won't feel guilty trying some of this homebrew in this fantastic beer-braised brisket recipe I have.