PRODUCT DESCRIPTION: Non-toxic grade material, Eco Friendly, safe for drinking. 500ml design, can fill more water and ensure enough water for one adult a day. Its transparent with scale, good to make a plan to drink water every day. Flip, Bite and Sip Easy and Comfortable: Just force apart the straw, enjoy spill-proof sipping at work or on the trail. Inside the lid valve seal design is perfect for leakproof.
