1.High-quality material: made of high-quality AS+PS plastic, non-toxic. Temperature resistance -20 ~ 120 degrees. It is durable, reusable and safe to use. Brand new high-quality leak-proof transparent water bottle, A5 paper size, 420 ml.2.*Minimum space occupation: flat square design, like a notebook, light, thin and strong. It is very convenient to carry, and can be put in handbags, suitcases, school bags, backpacks, briefcases and even clothes pockets. 3.Minimum space occupation: flat square design, like a notebook, light, thin and strong. It is very convenient to carry, and can be put in handbags, suitcases, school bags, backpacks, briefcases and even clothes pockets. *4.Wide range of applications: it can store soda, fruit infusion, juice, tea, refreshments, salad dressing, sauce, cold soup, baby food and travel necessities, such as shampoo and conditioner.