This protein bottle bottle blends powders with any liquid, so there’s no need for a plug! No more lumps in your smoothies because this bottle puts the smooth in smoothie. The secret is the whisking ball that combines the dry and liquid ingredients to a deliciously smooth consistency…time after time. Each bottle is pre-printed with a major drug company name on the side. 20 oz. capacity to cup brim – measuring marks to 14 oz.