Made of BPA-free food grade silicone. Nontoxic, no taste or odor and eco-friendly. The water bottle is but unbreakable. Reusable and can be exposed to temperatures ranging from 40 ? to 230 ?. Perfect for both hot and cold drinks. Leakproof compass cap: The thick, silicone body and sealed-tight lid prevent water to leak. The compass in the bottle cap can be taken out and offer you help in emergency. Easy to carry: Collapsible water bottle is allowed to be folded to save space and easy transport. Stylish and portable: Compact and collapsible portable design, prefect canteen for camping, hiking, military training, traveling, gym, biking, running etc.