Toss the plastic cups and put away the glass beer pints — neither are made to survive the outdoors anyway. Our vacuum insulated Stainless Steel Adventure Stacking Tumbler is supremely durable, so it won’t break, shatter, or rust. To keep your beer tasty, fizzy and cold for up to 4 hours, the Stanley Stacking Tumbler can store up to 1 Pints / 0.47L of your favorite beverage, making this ideal for any picnic, hike, or camping trip. It doubles as an excellent travel cup to hold tea, Glühwein or soup and keeps hot up to 45 minutes. You can stack them neatly in your camping kit or kitchen cabinet when you’re done.