Colder. Hotter. Longer. Grab this limited edition 20-ounce stone (grey) Hydro Flask featuring a wide mouth with flex sip lid. This lid is great for hot drinks. Keeps your refreshment hot for 6 hours and cold for 24 hours. Double-Wall vacuum insulation, BPA free, pro-grade stainless steel, & leakproof--this is sure to be your new favorite. Easy to carry while you walk or hike.