rawhide, nylabone, and sweet potato chew we gave her took some convincing but a water bottle was her first instant favorite. This is great for us because these don't cost anything. We do have to watch her carefully though because after a while, she'll start to pull off chunks of plastic and we don't want her swallowing any. She gets a little sad when we finally have to just take it away from her. Here she is chewing on a plastic cup from 7eleven. It's a fun one because it rolls around, makes noise when batted around and she can step in it to hold it down... or just put her whole head into it. I'm going to have to try to catch her doing that sometime so I can get a photo. She's so funny. Endless entertainment!