Stainless Steel Tumbler Set - 20 Oz. & 30 Ounce Tumblers - Keep Ice Frozen for 55 Hours - Eskimo Personal Cooler Mugs with EskiLock Lid SET OF TWO 30 OZ TUMBLERS: "COLD AS HELL" GUARANTEE: Buy With Confidence, If You Aren't Completely Satisfied With Eskimo's Stainless Steel, Vacuum Insulated, Double Walled Design Then Simply Return Your Favorite Tumbler Within the First 30 Days for A FULL REFUND, No Questions Asked. STAINLESS STEEL PERSONAL DRINK COOLER: Stop Drinking Out of An Ordinary Glass & Start Drinking Straight From A Cooler! Eskimo's Vacuum Insulated, Double Wall EskiTech Optimizes Your Beverage's Temperature. Keeping Your Beverages Colder Than Ice Or Your Coffee, Teas, & Soups Hot For Over 12 Hours! ESKIMO-INSULATED DOUBLE WALLED TECHNOLOGY: Eskimo's Premium Vacuum Insulated, Double Walled Design Traps The Cold Inside For Up To 72 Hours. GUARANTEED TO KEEP ICE FROZEN FOR UP TO 72 HOURS: Take Eskimo's Stainless Steel Travel Tumbler Everywhere You Go & Never Suffer Through Drinking A Warm Beverage Again! Great For Camping, Parties, Athletic Events, Canoeing, Biking, Running, Hiking, & Any Other Adventure You Need To Stay Hydrated Doing! ESKILOCK LID: Keeps Your Beverage Cold As Hell, While Preventing Your Favorite Beverage From Spilling With Their Vacuum Sealed, Double Walled Insulating Lid.