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Exchange CO₂ Tanks (mail-in)

Time: 5 minutes prep. Delivery: about 2–5 business days.

Step 1: Order a refill/exchange from the Refills page.

Step 2: Put two empties in the exchange box and apply the prepaid shipping label.

Step 3: Hand to your mail carrier. Once they scan it we ship you two fresh tanks immediately. You're charged only $20.99 per tank.

Pro tip: Keep three tanks total so one stays on the machine while two are out for refill.

Service area: USA only. Canada coming soon.

Last updated: July 30, 2025

Worldwide delivery

Receive your order anywhere in the world. CO2 only refilled in continental USA.

Online CO2 Refills

Never run out of gas again. We ship new tanks to your door and refill the empty ones.

Customer service

Talk to a real person via chat or contact form. If we don't answer we're asleep or on airplane mode, but will email back.

USA

From Brooklyn, NY, with tanks refilled with organic CO2 from U.S. farms. No affiliation to other brands or countries.