1. The spiral cap closes tightly. The water doesn't spill or make a mess.
2. Can put in the car cup holder.
3. Keeps beverages hot up to 6 hours and cold up to 8 hours.
4. Made of high-quality stainless steel material for durability.

Recommendation
1. Should not be contracted with concentrated acid or alkaline salt sich as fish sauce, lemonade, vinegar.
2. Avoid using stainless steel scrubbers.
3. Using a sponge to clean and dry properly after using.
4. Do not crash the flask' cause the double wall vacuuminsulation broke up and lost ability to maintain temperature.
5. Do not use with dry ice.