The underside from the cap is hollow, so this bottle can maintain a lot more than its marketed eighteen ounces (we fit 21 ounces of liquid whenever we crammed it to the brim). Photo: Michael Hession The straw lid twists off to expose a broad mouth that makes adding ice https://dissolving75320.anchor-blog.com/6993525/how-buy-can-save-you-time-stress-and-money