Made of food grade silicone. Collapsible silicone water bottle equipped with an aluminum alloy carabiner, ideal for travel, gym, bikes, running, camping, fishing, hiking, climbing, yoga, beach, outdoor sports. Designed with silicone seal ring to prevent leakage, wide mouth design makes collapsible water bottles easier to clean the interior or add ice, lemons into it.It is the perfect gift for anyone and any occasion, not only for travelling, but also for fitness, camping, hiking and so on.