No, backpacking fuel canisters, like MSR’s IsoPro canisters, are not refillable. When purchasing fuel in another country, please make sure the canisters you buy haven't been used and refilled, as this can lead to safety issues.
If you're interested in learning how to safely recycle your IsoPro canisters, click here to check out our blog post.
Although there are adapters available that allow for consolidating canister fuel, we advise against using them. Our canister stoves are designed with specific pressure and combustion properties in mind, and refilling canisters can introduce risks.