Made of 18/8 stainless steel, our Basecamp Tundra Bottle features a 20 oz. capacity, narrow-mouth design, powder coat finish with copper lining, a proprietary BPA-free insulated lid and the double wall vacuum insulation keeps contents cold for 24 hours or hot for 12 hours. Your purchase makes a difference! Basecamp will donate $125,000 in 2022 to support Wounded Warrior Project’s mission to honor and empower wounded warriors. To learn more, visit www.woundedwarriorproject.org.