I was not impressed with these bottles. There are way too many parts and they didn't prevent air bubbles more than any other bottle. The pieces have many little nooks and crannies that mold can grow in if you aren't careful enough to wash thoroughly
The idea is very cool, but the smell still lingers like any other garbage can. The bags are expensive but easy to change. If I have to, I will use a regular garbage bag. Overall, not a bad concept, i just wish it concealed the smell a little better.