Never researched it before but knew there was a substance in the bottle to stabilize the gas.....and didn't expect calcium silicate but it makes sense. Who thought about doing that?? lol It amazes me that there is so much stuff out there that someone figured out what to do with it. Anyways, not worth the effort to cut them in half for scrap but what else is there to do with them except to take the valve off and throw the little bottles in the trash? Anyways, the larger bottles sell well but the little ones do not.














