Food Grade Silicone is used to make the Rabitat Squeezy bottle, and is about the best material for a feeding bottle. The Bottle is made to look like a normal feeding method, which helps to prevent bottle rejection. The Squeezy bottle has two anti-colic valves to prevent the infant from being sick. Because of the large mouth and four easy-to-clean pieces, you won't need to use the bottle brush to ensure that the bottle is properly washed. The bottle is BPA, PVC, and Phthalate free and dishwasher and microwave safe.