Blue SIERRA Stainless Steel Tumbler, Vacuum Insulated Double Wall Travel Mug, 30 oz Of Portable Hydration TAKE IT ON THE ROAD - Narrow Bottom Makes The Tumbler Fit In All Car Cup Holders. BACK TO SCHOOL - Perfect For Staying Hydrated During Class. SPILL PROOF LID - The Sliding Lid Prevents Liquids From Splashing Out Of The Mug. EXCELLENT TEMPERATURE RETENTION - Keeps Beverages Hot Or Cold For 12 Hours. GET A FREE GIFT - eBook With Healthy Fruit Shakes Recipes.