JTENG (Set of 2) silicon Foldable Water Bottle Collapsible driving Water Bottle BPA Free for Yoga skiing Running Camping Cycling Hiking (a black 1 blue) 1.Perfect for Skiing,surfing,Yoga,work, school, gym, running, hiking, biking, boating,surfing,bicycle,picnic,camping,Easy to wash and carry, dishwasher safe 2.Each bottle holds 500mL or approximately 20oz,designed to stand upright when full and can be folded, rolled up, or laid flat when empty 3.It is not going to get leaks from anything they are very durable 4.Made of 100% food grade silicone passed FDA,LFGB test, durable and flexible enough to folding. 5.You can put boiling water or ice-cold fruit juice in the bottle without any problem