Food Grade PP+Stainless Steel Material Built-In Silicone Leakproof Ring Seal Leakproof .
Featured dual walls, High performance temperature retention, keep liquid hot up to 8-12 hrs and cold up to12- 24 hrs.
It slides easily into the car cup holder,the bicycle rack or the bag on both sides of the backpack.
The capacity is perfect for carrying around, whether it's at outdoor sports, office, beach, school, picnic, hot yoga, hiking, camping, cycling, running, walking, gym, fitness, etc.