Hydro Flask 24Oz Sm Black Lc, 1 Each Medium (Standard Mouth) opening, Double Wall Vacuum Insulated Keeps Hot up to 12 Hours, Keeps Cold up to 24 Hours BPA-Free, 18/8 Stainless Steel Signature Powder Coat Finish With a convenient 24 oz capacity and a moderately wide mouth opening, it's great for sports drinks, juice, smoothies or water.