Que bottle's unique design reflects the company's advocacy and philosophy towards a greener lifestyle and saving space for what matters. This collapsible water bottle has been praised and featured by international environment institutions like Rainforest Trust, Coral Reef Alliance and many more. It's the perfect travel companion for the adventurous. It's lightweight and compact so you can take it with you anywhere you go and stay hydrated in style. It's also 100% BPA-free and made from food-grade silicone. Unlike other water bottles, it's taste and odour-free as well as stain and bacteria-resistant. Que bottle cap is made out of stainless steel.