Leak-Proof Coffee Mugs: MOMSIV coffee mugs have a BPA-free screw cap that prevents water from leaking. It keeps your drinks safe and comes with a splash-proof flip cap for comfortable drinking. Just open the swallowing hole. The outer side of the lid is designed with an inner square and an outer circle, which is easy to open. Quick twist for easy opening and cleaning Heat and Cold Storage- MOMSIV Insulated Travel Mug maintains temperature to a great extent and keeps drinks hot or cold for 6 hours. Pour hot or iced coffee into a coffee mug and keep it all day. Comfortable Filling and DrinkingThe thermos cup has a large opening for adding water and cleaning. A small opening on the top edge of the lid, which can be opened 180. Not only is it comfortable to drink, but it also prevents hot cups from pouring too hard and spilling too hard. (Dishwasher not recommended) Double-Layer Stainless Steel Coffee Mug - The inside of the mug is made of high-quality stainless steel, which is strong and durable to prevent bacterial growth and keep beverages smell-free. Practical Style: Put the leak-proof insulated glass in your pocket, backpack or suitcase without worrying about spills or leaks. Take it with you to the office, school, travel, party, etc. Have a great day and great wine