Incrizma stainless steel high quality coffee mugs is made of food grade S304 stainless steel on both sides of the walls long lasting and does not shatter or break like glass and plastic coffee mugs. The double walled construction keeps the contents hot or cold and keeps your hands comfortableperfect choice for using indoors or out. SPECIFICATIONS Food grade material: 304 stainless steel food grade PP lid EU standard silicone ring BPA & BPS free Splash Proof Tumbler Lid Travel coffee mug includes a flap opening that makes drinking one-handed a breeze. The tight clip seal on the Flip Lid helps prevent splashing and spilling. Fits in Most Vehicle Car Cup Holders The travel mug fits in most vehicle car cup holders. Inside sealed silicone ring 360° not leak proof you can take the mug to any where you want. Keep Hot and Cold The high-quality stainless steel and the double-walled insulation design ensures beverage can stay either hot or cold for a long periods. Hot drinks in winterlike coffeecan keep hot up to 6 hours.Cooler drinks in summerlike lemonadecan keep cold up to 12 hours. Note: 1.Please sterilize by boiling before use. 2.Please use caution when dressed up hot liquid shaking! 3.Use soft material to clean cup in case of damage. 4.Do not hold strong acidic and alkaline liquid in the cup.