Tough, durable, & virtually unbreakable. This Collapsible Water Bottle is great of running, biking, jogging, skiing, walking, yoga, camping and travel. Our bottle is safe for you and the earth; BPA free, microbial resistant, none toxic and recyclable. HOW TO USE: Simply use circle toggles to push or pull sides of water bottle in & out. Pull out when filling up with water, push in to conveniently store. Mad Man, masters of men's gifts. Material: Silicone/Food Grade PP. Dimensions: 8.25" x 2" & holds 19 0z.