Buy the Full Size. Get the Travel Size FREE. Two Sizes. One Perfect Duo. For a limited time, purchase one ROKiT Oxygen 10.4L full-size can and receive a 6L compact travel-size can FREE! That&';s 16.4 liters of 99.9% pure recreational supplemental oxygen and up to 345 one-second inhalations in one convenient bundle. Keep One. Carry One. Stay ROKiT Ready. What&';s Included 1 x; ROKiT Oxygen Full-Size Can - 10.4L 10.4 liters of 99.9% pure oxygen Up to 220 one-second inhalations 800mL canister Perfect for keeping at home, in the office, or close by throughout your day 1 x; ROKiT Oxygen Compact Travel Can - 6L - FREE 6 liters of 99.9% pure oxygen Up to 125 one-second inhalations 500mL compact canister Convenient for backpacks, gym bags, and outdoor adventures Exclusive travel size, not normally sold separately Why You&';ll Love This Offer Buy One, Get One FREE: Purchase the full-size 10.4L can and receive the compact 6L travel can at no additional product cost. 16.4 Liters Total: More oxygen and more convenience in two sizes. Up to 345 One-Second Inhalations: Combined estimated uses across both cans. 99.9% Pure Oxygen: Recreational supplemental oxygen in portable cans. Keep One. Carry One.: A full-size can for home and a compact can for your daily adventures. No Batteries or Charging: Simple and ready whenever you need it. One for Home. One for the Go. Whether you&';re at home, heading to the gym, or enjoying the outdoors, the ROKiT Oxygen Home & Go Duo gives you the flexibility of two convenient sizes. Buy the 10.4L Full Size. Get the 6L Travel Size FREE. Keep One. Carry One. Stay ROKiT Ready. Disclaimer: ROKiT Oxygen is intended for recreational supplemental oxygen use only. It is not a medical oxygen product and is not intended to diagnose, treat, cure, or prevent any disease or medical condition. It is not a substitute for prescribed oxygen or emergency medical care. Check applicable airline and transportation restrictions before traveling with compressed oxygen canisters.