100 Percent Safe and Odourless Material: Made from Tritan co-polyester, these water bottles are entirely BPA-free and non-toxic, the Tritan material is extremely strong, durable and impact resistant, It will also withstand temperatures from -10°C to 96°C 360° Leakproof Design: This water bottle includes a watertight lid with drinking spout and air vent to balance pressure, making it easy to drink from while on the move, the lid has a strong, click-shut, closure mechanism to ensure it stays shut when you need it to, this requires a reasonable amount of force, so when closing please PUSH DOWN HARD until you hear it 'CLICK' CLOSED Portable for Multiple Activities: The 650 ml capacity achieves a perfect balance between utility and portability, with a carry loop, you can use for both indoor and outdoor exercises, including cycling, running, camping, hiking, yoga, treadmill, etc, the compact size also fits your backpack and bottle holder perfectly Practical use with protein shakes and other drinks supplements: The measuring scale on the reverse means you can quickly and accurately measure out supplements to make your prefect healthy drink Ideal Gift for Families and Friends: This sports bottle can be used by almost anyone, anywhere, with multiple uses, so is an ideal gift option for both families and friends Recommended for Duke of Edinburgh's award: This kit is part of the recommended list of products for this prestigious award