20 Oz. Plastic Blender bottle with stainless steel mixer ball, BPA and Phthalate free. The lid on our shaker bottle secures tightly to the bottle to insure that there is no dripping or leaking, so that even when commuting the lid stays tightly fastened to the bottle! The stainless steel anti rust mixing ball ensures that even the thickest ingredients, such as pancake batter or other thick protein shakes, will blend together with ease! The measurement markers on our bottle allow you to measure your ingredients properly so you can get the best results possible! 3 3/4''Dia x 8 1/2''H