I was sent a replacement, and guess what? Yep, it sprung a leak in the exact same place as the first one.  Followed instructions both times.  This last one I was only able to use one time before it failed.  STAY AWAY! STAY FAR FAR AWAY!!! There are far better products out there.  THIS IS GARBAGE!!!!!!! Had to put 3000 glue over spot to stop leak but it cannot be refrozen or used.