This high-quality water bottle bag is made of high-quality neoprene, which is soft, flexible, durable, warm, waterproof, shockproof and non-slip. It can be machine washed and the color does not fade easily. Suitable for most bottles with a diameter of 2.5-4 inches and a height of 11-20 inches. The bag has a large capacity and to hold 40 oz Stanley, and like tumblers. It can be used as a shoulder bag, cross-body bag or hand-held bag. It is very suitable for cycling, running, hiking, skiing, mountaineering, camping, traveling, etc. It is also a good choice for gifts.