Has anyone ever found or made bottle tops which let CO2
escape beyond a certain PSI level? I'm thinking something like a pierced cork, probably rubber or plastic, not cork wood, and likely having a hole piercing it. Maybe someone even better?
Or has nobody ever seen anything like this before?
I'm experimenting with some wine corks right now. If something works, I'll post back. (Hey, you never know!) What I'm trying is piercing corks with different shaped holes (slits), hoping to find just the right shape which lets gas pass through but only at a certain pressure level. Yeah, I know it's unlikely that I'd get 2 corks in a row that'd have consistently equal holes, but I thought it worth trying anyway.
From a manufacturing standpoint, I imagine the "hole" technique would be hard to perfect, not to mention being able to sanitize them for re-use, hehe.