Advanced Tritan™ copolyester looks like metal but it offers the lightweight convenience of a BPA-free plastic that is food/dishwasher safe and won't retain odor or flavor. Flip-straw lid enables quick sips and resists sloshing on the go. Holds 24 oz and measures 2 7/8" x 10 5/8". Do not microwave. Union made in the USA. Metallic Blue.