Material Science: 1. Internal 304 stainless steel 2. External 201 stainless steel Size: 18*10*7cm Capacity: 500ML Package included: 1 bottle, 1 * pipette explain: 1. The liner shall be cleaned before the first use. 2. First clean the inner tank with a small amount of hot water or ice water (do not use steel wire balls), then pour it out and it with boiling water or ice water to better insulation effect. 3. Please clean and keep dry after each use. 4. It is not recommended to store carbonated drinks in the cup for a long time to prolong the service life of the insulated cup. 5. Do not get close to the heat source or hit it violently. 6. Keep out of the reach of children to avoid scalding. Durable Heat Preservation, The Vacuum Of The Cup Will Block The Heat Transfer 304 Stainless Steel Cup And Stainless Steel Straw Suitable For Easy Travel, Outdoor Sports, Office, Beach, School, Picnic, Hot Yoga, Hiking, Camping, Cycling, Running, Walking, Gym, Fitness, Etc You Don't Have To Test Your Temperature With Your Mouth To Avoid Burns. 360 ° Rotation, No Need To Worry About Water Leakage, Good Sealing Smooth Cup Mouth, Unique Shape