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 4.25in square x 10in high. Holds 2 quarts. Nipple is 1in diameter x 4in long. 12/Pkg.