Specifications Cold insulation: below 10 degree (6 hours) Material: 304 stainless steel Inner pipe: 201 stainless steel Cover: 201 stainless steel/304 stainless steel/PP Sealing ring: silica gel Smart Vacuum Flask Stainless Steel Water Bottle Thermos with LED Screen temperature Display with Vacuum Insulated and anti-slip design. The bottle is equipped with an LED touch screen for prompting real-time water temperature displaying the drink temperature without opening the lid. The 500ml. Capacity is perfect for carrying around, whether it's at the office, in the car, metro, while shopping, at the beach, in school, University, while doing outdoor sports or other activities, picnic, yoga, hiking, camping, cycling, running, walking, gym, fitness, etc.. It slides easily into the car cup holder, the bicycle rack, bag or a backpack. Enjoy the pleasure of free movement and smart portable consumer-friendly bottle. Note: Please fill liquid to marker to prevent it from overflowing