You don't need to buy a whole new canister - just exchange your empty SodaStream CO2 Canister for a full one, and pay $21 (that's a savings of $14.99).
Not only will you save money, but you'll help save the planet - the canisters are refilled and recycled.
The SodaStream Canister Exchange is available through in-store and Click & Collect purchases only. For Click & Collect orders, add the regular priced canister to your cart, complete your order, bring the emtpy canister with you to pick up your order and the discounted price will be applied upon exchange. Find a store near you.