Ultraspire Soft Collapsible Bottle with Red Straw | BPA and PVC Free FEATURES - 500 mL soft bottle with an infusion valve and a 5/16" diameter straw; 4.The tube can be trimmed to preferred length HYDRATION VEST COMPATIBLE - It fits in the front vest pockets for quick access and hands-free delivery NO EFFORT NEEDED - Amazing flow thanks to the infusion push/pull valve EASY TO PACK - Soft material conforms to any pocket 100% BPA & PVC FREE - Taste and odor free; No harmful chemicals; Phthalate free