The description :

Leakproof Water Bottle, Double Wall Sports Travel Mug, Keeps Cold and Hot
The inner wall is made of food grade stainless steel and the outer shell is made of high quality stainless steel. It also has a silicone base designed to prevent it from slipping and spilling. The other parts are made of BPA-free PP, food-grade silica gel and co-polyester plastic which makes it safe and healthy to use.
Features double walled, premium plated brass on the outside of the inner wall. High performance temperature retention, keeps liquid hot for up to 12 hours and cold up to 10 hours.
The stainless steel flask is designed to reduce spills and slippage. The bottle is leak-proof and secure in the bag when on the go. 17oz/500ml water bottle fits in most cup holders and fits easily into a travel bag.
The inside of the lid is integrated with a leak-proof polypropylene silicone ring. Simple structure, washable with the spout removed, the cup spout is smooth, will not cut the lips, the cup has a large diameter, has a detachable filter mesh, can filter residues such as tea. The bottom of the cup is made of non-slip material, which is not easy to slide and is durable.
Perfect for easy travel, perfect for outdoor sports, work, beach, school, office, picnic, yoga, hiking, camping, cycling, running, etc. Simple and practical, it is the best gift for friends, family, kids, sons and daughters.