Bottle is sturdy and sanitary, made of FDA-approved, food-grade polyethylene plastic that is durable yet translucent enough so you can see the content level. Nipple is made with a special rubber formula to prolong nipple life and improve pliability. Handy snap-on top. Bottle is 4.25 inch square by 10 inch high, holds 2 quarts (4 pints). *Bottle is FDA-approved, food-grade polyethylene plastic *Translucent to show content level *Handy snap-on top *2-quart capacity