Recycled 18/8 stainless steel, BPA-free Double-wall vacuum insulation Silicone base Dishwasher safe Hot 40 minutes, cold 4 hours, iced 16 hours Get the best of both worlds with the Lifted Spirits Highball Glass. Constructed of recycled stainless steel, it’s plenty durable for your next tailgate party — yet elegant enough to display on your bar cart. The interior features our Prismatic design technology, giving the surface a sparkling, cut-crystal look. And you can count on our double-wall vacuum insulation to keep your cocktails nicely iced or toasty-warm. Bonus: the non-slip silicone base keeps your beverage in place.