Hydro Flask 12 oz Vacuum Insulated Stainless Steel Water Bottle, Standard Mouth w/Loop Cap, Plum Medium (Standard Mouth) opening, Double Wall Vacuum Insulated Keeps Hot up to 6 Hours, Keeps Cold up to 24 Hours BPA-Free, 18/8 Stainless Steel Signature Powder Coat Finish The smaller, convenient size is ideal for kids