Keep your coffee magically hot while searching the halls of Hogwarts with the help of this officially licensed Harry Potter Happiness Can Be Found 20 oz. Stainless Steel Tervis® Tumbler With Lid. This sleek double-walled Tervis® Tumbler features a cool Harry Potter Happiness Can Be Found design that's printed with eco-friendly plant-based inks directly on the stainless surface. This tumbler comes with a BPA-free leak-resistant, easy-to-clean, and easy-close hammer lid. Triple insulation reduces condensation and keeps your drink hot for up to 8 hours or cold for up to 24 hours (use caution with hot liquids). Copper-lined 18/8 stainless steel construction is durable, and the material won't retain tastes or odors. For best results, hand wash with soap, water, and a scratch-free sponge. Towel dry immediately to help preserve decoration. Do not soak or use cleaning materials (bleach, chlorine, etc.) and do not put in dishwasher, freezer or microwave. All sizes are US sizes.