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 4.Need attention - Filling with water, tea, coffee, or any other beverages lower than 60 ℃ / 140 ℉. 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 3.Wide application: these clear milk water bottles can be widely applied to various 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 5. You can fill it with drinks, take it out to the mall, fill it with milk and put it at the head of the bed to read, or decorate coffee to refresh yourself and put it in front of the computer desk. You can take it with you when you need it to bring you a good mood and state.