Just go my mini and am thrilled to say the least. However, when filling up the juice bottle, the 0-ring came out. On trying to get it back in,(EXTREMELY slippery) it fell and bounced somewhere and I can't find it. I pmed Rob and he gave me the measurements so I can get a new one and even offered to send me a new one. I'll be going to the hardware store today but I'm not sure how to seat it in the cap. Does it go in the threading or further up closer to the small end of the cap? Any suggestions on a tool to use to get this done quickly? For now, I blew out the tubing and snugged up the bottle and it worked for awhile, now I have air bubbles again. I thought I'd try here with this question so I don't have to keep bothering Rob, obviously a very busy man. Thanks to all...