We love our 30 oz Ozark Trail mugs, so we went on the hunt for the can coolers too. None of our local WalMarts had them, so I ordered 7 online. They are an excellent product, keep cans/bottles cold a really long time, and the cost is so reasonable. The only problem we had was that all 7 were defective. The screw-0ff ring is supposed to be one piece. The "glue" step in the construction process must have not been working because all 7 tops come off in two pieces: the silver ring slips off of the black plastic screw top. My son-in-law bought his can coolers at a WalMart in Oklahoma and his are glued tight. We had such a hard time finding these that my husband doesn't want to return them, so we are going to try a hot glue gun or Gorilla glue to fix them. Hope that works!