1.Reliable material: the clear square water bottle is made of quality PS plastic, sturdy and solid, not break or deform easily, the and edge are polished carefully, exquisite workmanship makes it no burr, smooth to touch, do not worry it scratch your hands while using, no odd smell, providing you with a comfortable use experience 2.Practical leakproof design: this outdoor water bottle square is designed with 2 openings, one big and one small, the double design keeps the liquid from leaking out, and soiling your bag or hands, while the larger opening allows you to put small pieces of fruit in the cup, to DIY your own drink and add flavor to it 3.Wide application: these clear milk water bottles can be widely applied to liquids, like hold milk, fruit juice, water, soda, beer, tea and so on, which is suitable for diverse outdoor activities, such as running. cycling, biking, climbing, fishing; Transparent design provides convenience to observe the remaining of the drink 4.Need attention