The Rabitat Bottles are made of Tritan, a BPA-free, PVC-free, and toxin-free material. They are also leakproof. Not only is the bottle spill-proof, but it's still kid-proof. They are free to experiment with it as much as they want. It is not going to spill. Dishwasher-friendly The bottle is dishwasher safe and easy to disinfect. Tritan is used to produce this stuff. Tritan is a BPA-free, impact-resistant plastic, so you can be assured that it can stand up under heat. Spill-Proof - Since the Snap Lock bottle is spill-proof, you don't have to be worried with spills. (Even though it is open.) One touch open - A quick one touch open makes opening the bottle simple for little hands. Drinking water that is free of contaminants.