[FDA Certificated] Folding Silicone Water Sport Bottle BPA Collapsible Travel Outdoor Leak Proof Water Bottle (750ml) - Black Made from BPA free, FDA Approved, medical grade silicone (higher than food grade) No plastic taste or odor. Environment friendly material. If you do not use the collapsiblewater bottle,you can huddle it up to save space. Foldable for traveling, hiking, and camping. Fits in car cup holders and bike bottle racks. Easy to lug around with attached carry strap.