Features: We offer two capacity option: 2L and 3L. 2L is suitable for short distance hiking and running, while 3L meets the needs of long-distance hiking, activities, and other outdoor activities. Make of light weight and enduring plastic, it can be folded and stored in empty bag, with a compact size that does not take up space, making it easy to fit into the backpack side pockets or compartment. Equipped with a soft long straw and bites suction gate design, drinking water can be done without stopping. Single hand operate allows for easy control of water flows, saving time and energy, especially suitable for rapid hydrations during high-intensity sports such as marathons and running. There is a double sealing design at the interfaces, which prevents water leakage even when inverted or vigorously shake, ensuring that the items inside the backpack are dry. Specifications: Component: Plastic Capacity: 2L/3L 3L Size: about 18x40cm/7.09x15.75inch 2L Size: about 17x35cm/6.69x13.78inch Package Includes: 1pc Outdoor Drinking Camping Water Bag note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.