With an efficient cooking and snow melting protocol, such as described in Saving Time and Weight: A "Winter Water" Routine Tuned for Lightweight Style by Ryan Jordan, a skilled winter hiker could probably get by with only 110 g of fuel per day. With an efficient pot that incorporates a heat exchanger like we’re giving Bob, this figure could be even less. But, in view of Bob’s hiking...ummm...”style”, I elected to send him out with a full 450 g of fuel for his 3-day trip.
The choice of fuel canister was easy: the Primus PowerGas 450g Canister. This canister has the highest fuel to weight ratio of any currently available Lindal valve mixed-butane/propane fuel canister. Fuel Weight: 450 g. Empty Canister Weight: 7.7 ounces. MSRP: $8. Available: Now.