DOUBLE-WALL INSULATION: Our classic water tumblers are double walled and vacuum insulated, which keeps your drinks hot up to 4 hours or cold up to 9 hours. The high-quality, no-sweat design ensures your desk stays free of condensation. STAINLESS STEEL SKINNY TUMBLER: Made of 18/8 food grade stainless steel with Paint coating, no more worries about peeling or rusting.Highly durable construction and splash-proof design make the travel tumbler great for indoor and outdoor use, it's an ideal coffee tumbler for keeping. Dishwasher cleaning is not recommended PORTABLE&ECO-FRIENDLY: Thanks to its slim and sleek body, it is easy to carry and store , also it fits in most cupholders. BPA-free slider lid and plastic reusable straw are totally eco-friendly and safe for drinking. PERFECT GIFT SET: Each insulated tumbler comes with 1 x splash-proof lid and 1 x plastic straw. This 20oz tumbler is a stylish and practical gift for your friends, families, or colleagues on birthday, Christmas, Valentine's Day, Halloween, Mother's Day or Father's Day. PRACTICAL TUMBLER: The coffee tumbler with sliding lid can be used as wine cups, champagne cups, water cup or sports fan travel mugs, suitable for parties, picnics, self-driving travelling, boats, beach, pool, camping and hiking, etc. The travel tumbler is suitable for water, coffee, hot cocoa, milk, tea, wine, lemonade, juice, smoothie, champagne, cocktails, milkshakes and other drinks. Strong ability to maintain the temperature of whatever beverage you put in it.