Dogs just can't resist the satisfying crunch of an empty water bottle! That's why we've designed FAT CAT? Water Bottle Crunchers. Perfectly sized for empty water bottles (or any empty plastic bottle up to 20 oz in size!) This toy packs a punch with a crunch. Made of heavy-duty canvas construction for durability. It's refillable! Use an old water bottle to fill this toy at the handy-dandy opening. Ships in assorted characters either Snake or Caterpillar.