1. KEEP BEVERAGE HOT AND COLD-The 17 oz insulated travel mug adopts 304 stainless steel materials, nonpoisonous and harmless, and double walled vacuum technology can keep the drinks hot and cold for a long time as same as keeps the fresh flavor insulated for the beverage, coffee and tea. 2. SINGLE-HANDEDLY OPEN DESIGN-The coffee tumbler use the brilliant latch lock lid feature, press lightly and turn the latches upward to close state, conversely open, latches firmly, opens easily and suitable for the situations unable to your hands. 3. SPILL &LEAK PROOF-Lock feature on the top prevent the liquid leakage, and the lid equip with the rubber ring, ensure install the little rubber ring inside the lid, and latches firmly so the cap doesn't leak. 4. SAFETY & SUPER QUALITY-Quality assurance of the inner and outer layers 304 Stainless steel material, the latch use the food-grade BPA- plastic, making it r to drink.