Crinkits dog toy turns a useless empty water bottles into crinking fun. It's patented design is a durable cover that fits snug around an empty water bottle. Crinkits give your dog an interactive toy they won't want to put down. Crinkits are made in the USA of a very durable, safe, and recyclable material we call Zigflex. It floats and is very easy to rinse clean. From bulldogs to labs, it's love at first Crink.