Premium and Durable Material: Made of high-quality stainless steel, this cup offers exceptional robustness and a long lifespan, withstanding intensive daily use. Collapsible and Space-Saving Design: Thanks to its ingenious, retractable design, this accessory easily folds up to save maximum space, slipping effortlessly into your backpack or luggage. Lightweight and Ideal for Outdoor Use: Perfectly portable and lightweight, it is the ideal companion for camping, holidays, picnics, and all your outdoor adventures. Guaranteed Hygiene and Safety: Equipped with a leak-proof lid, it keeps your drink clean and prevents spills, giving you peace of mind on the go. Convenient Capacity: With its 240 ml capacity, this cup is sized to meet your hydration needs during short outings or sports activities. This product is sold by xiaosong on behalf of a third-party seller; it is a compatible product. None of the products offered in this store come with two batteries; they are powered by a single battery. Note: 1. Due to variations in brightness and screen settings, the product color may differ slightly from the images shown. 2. Please allow a measurement error of 1-3 cm due to manual measurement. 3. Please check that the size is suitable before purchasing. Thank you for your understanding!