Material: BPA-free, phthalate-free and toxin-free, making these reusable water bottles a healthy choice. Applicable objects: The perfect gift set for family, friends, partners, travel enthusiasts, and even the who travels frequently. Capacity: 600 milk carton folding water bottle. Food grade silicone material. Portable: easy to carry, suitable for travel, family vacation, vacation, airplane, hiking and camping trips. Product features: The two-layer structure eliminates condensation and stagnant water, so it is easy to carry these travel bottles with you