Gas One Brand Camping Stove includes one canister of Butane:

If rented for 2 days (1 Night) you receive: 1 Canister Butane

If rented for 3 days (2 Nights) you receive: 2 Canisters Butane

If rented for 4 days (3 Nights) you receive: 3 Canisters Butane 

If rented for 5 days (4 Nights) you receive: 4 Canisters Butane 

If rented for 6 days (5 Nights) you receive: 5 Canisters Butane 

If rented for 7 days (6 Nights) you receive: 6 Canisters Butane