Polyethylene plastic collapsible water bottle with polypropylene lid and rubber spout. Holds up to (460 mL) when fully expanded or 16 oz.(300 mL) when collapsed. Screw-on lid with drink-through push/pull spout. Always have lid off or spout open when expanding or collapsing bottle. These bottles are intended for cold beverages only and should not be stored near extreme heat. Hand wash only. Not dishwasher safe or microwaveable.