I had always held my local Petsmart in higher reguards than my Petco or Walmart because I've never seen a dead betta on their shelves, they all look fairly healthy. However, I was making small talk with one of the salesmen, and he told me that bettas can practically live in anything. He said his dad kept them in drinking glasses, and why not buy them, they're so cheap! I didn't have enough cajones to tell him how wrong that was. He was a dog trainer, so hopefully he doesn't pass on his betta keeping advice to other potential buyers...