STAINLESS STEEL BOBA CUP: Reusable boba tumbler with a big straw that conveniently fits in cupholders and easy to carry. Perfect for coffee, boba tea, smoothies, milkshakes, water, & protein shakes. DUO-MATERIAL METAL STRAW: Comes with a stainless steel wide duo-material straw. DOUBLE-WALL VACUUM INSULATION: Keep your drink hot for 8 hours or cold for 6 hours, so you can enjoy your drink at their best temperature for longer. ECO-FRIENDLY: Reduce your environmental footprint by rejecting single-use cups. * Comes with a straw cleaner.