Ultra-Thin Folding Design: It adopts a foldable design, which can be folded to 5.5 cm and 2.1 inches. It occupies a small space and is easy to carry. It allows you to drink in your own cup anytime and anywhere, which is safer and more hygienic Rugged and Durable: the temperature range that can withstand is -58F to 392F (-50C to 200C), whether you want to drink cold or hot drinks, it can satisfy you, such as coffee Safe Material: using food-grade high-quality silica gel, no BPA, no harm to the human body, you can use it with confidence, at the same time, it is not easy to break and lighter than the glass, and it is easy to clean, and it can be cleaned under running water. Leak-Proof: You only need to gently press the lid on the top of the cup, and the cup is fully leak-proof and dust-proof. You don't need to worry about liquid leaking from your bag. You can also hang it on the hand strap and portable hook On the bag Continuous Use: Compared with the disposable cup, it can be used continuously, avoiding environmental pollution, and can be used as an office coffee cup, a portable camping cup, a travel cup and a retractable school cup suitable for children.