Eskimo Coolers FBA_638872438852 Stainless Steel Tumbler Set-30 Oz. Double Insulated Thermos-Keep Ice Frozen for 55 Hours-Romatlink Personal Cooler Mugs with EskiLock Lid, 30 oz, Silver COLD AS HELL" GUARANTEE: Order with confidence! If you aren't completely satisfied with your 30 oz. Eskimo stainless steel, vacuum insulated, double walled design then simply return your tumbler within the first 30 days for a FULL REFUND, no questions asked. DOUBLE WALLED PERSONAL COOLERS: The 30 ounce tumbler allows you to enjoy a frosty beverage anywhere you are! Stop drinking out of an ordinary glass and start drinking straight from a cooler! Eskimo's vacuum insulated, double walled EskiTech design optimizes your beverage's temperature. Our proprietary design keeps your beverages ultra cold for up to 72 hours and your hot coffee, teas, and soups scorching hot for over 12 hours! ESKIMO-INSULATED DOUBLE INSULATED TECHNOLOGY: The secret to keeping drinks icy for so long lies in our unique design. Eskimo's premium vacuum insulated, double walled design creates a thermal barrier, which traps the cold inside for up to 72 Hours. GUARANTEED TO KEEP ICE FROZEN FOR UP TO 55 HOURS: Take Eskimo's stainless steel travel tumbler everywhere you go and never suffer through drinking a warm beverage again! Great for camping, parties, athletic events, canoeing, biking, running, hiking, and virtually every adventure you could possibly dream up. ESKILOCK LID: Keeps your beverage "Cold As Hell", while preventing your favorite drink from spilling with our vacuum sealed, double walled insulating lid. Lock the cold inside and take your beverage anywhere you go with our "Cold As Hell Guarantee."