dangerousD
WKR
Pros:
Maybe guys know about these but I didn't really look into it much until I saw Aron Snyder showing it off on Instagram recently. I'm guessing a lot of guys have half used isobutane fuel canisters laying around that never get used very often since you always leave home with a full canister. This little tool solves that and lets you buy larger fuel canisters that are about 1/4 the fuel price than buying the 100g Jetboil canisters. Easily lets you transfer fuel from one can to another. Goes super quick (seconds) with a warm can and a cold can. Cold being the receiving can.
Cons
Can be easy to overfill if you don't stop and check the weight of the can periodically or give it the scientific shake test. I actually overfilled it on my first attempt. So I was going to put some back in the other canister. I set the overfilled one in the window sill in the sun for about five minutes to warm it a bit and the bottom was already bulging on the can!
Otherwise I think this will be a great addition to my gear. I bought the more expensive model with the vent on it which is supposed to make filling easier without the need to have one warm and cold. I'm not sure it's worth the extra $10 but time will tell as I fill more canisters.
Edit: Refilling canisters is obviously dangerous and could result in catastrophic failure. As noted in a below post by mrgreen, Here's a link to what can go wrong when done improperly or filled solely with propane. My plan is to only transfer like brands of fuel between canisters and not mix brands and always fill to normal level. If overfilled, vent off excess or transfer back to another canister.
Amazon.com : G-Works Gas Saver Plus Upgrade Cartridge Exchanger Anodize Duralumin : Sports & Outdoors
Here's the standard version without the vent.
Amazon.com: G-works Gas Saver R1 Cartridge Exchanger Anodize Duralumin: Office Products
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