The Campingaz 904 Campingaz refill EMPTY Exchange Refilling 904 Camping Gaz Calor Gas Bottle is a gas canister designed for camping and outdoor cooking. The empty canister can be exchanged and refilled with gas, making it a convenient and practical choice for extended camping trips. With the trusted Campingaz brand, you can rely on the quality and durability of this gas canister for all your camping cooking needs.