Natural and safe to use, the 2-pack of 10-Liter and 3-pack of 5-Liter Natural Flavored Oxygen Bottles from Boost Oxygen provide supplemental oxygen wherever you need it. Boost Oxygen provides pure, natural respiratory support that is effective to use. Unlike caffeine, sugar, and other stimulants that can harm the body with extended use, Boost canned oxygen offers supplemental oxygen in a non-prescription form to help every cell in your body. The compact 5 and 10-liter sizes make these canisters great for use on the go and for day trips to areas with high altitudes. The breathing oxygens are all-natural and are great for athletes, older folks, or even to help combat jet lag. Supplemental oxygen can even help in workout recovery as a natural way to get you back to feeling your best. Increase energy and feel better on the go with the 2 and 3-pack of 5 and 10-Liter Natural Flavored Oxygen Bottles from Boost Oxygen.