Bluewave Bullet BPA Free Reusable Sports Water Bottle &ndash; 0.6 Liter (20 oz) (Gen2) 0.6 liters (20 fluid ounces) 55mm opening  large opening for easy pouring, cleaning, or to add fruit slices and ice Includes pop-up cover sports cap & removable straw  interchangeable caps available Eastman tritan 100% bpa free & reusable plastic Go green  reusable, no leeching of chemicals, safe for long-term storage