I ordered a GS Air tank from FT over a month ago. When I opened it the glass was broken. I started a ticket and thought they were going to send me another unit. Today I got a small package with a glass tube and one oring instead of a new unit. It really made me mad. I don't think it's a good idea to use a topper that had broken glass in it. Even if I rinse it out good, I'm not sure it's a good idea.