UKC

This has got to be the most novel thing ever. On a very basic level certainly!

https://www.absolute-snow.co.uk/V/Jetboil_Jetgauge_Digital_Fuel_Canister_Sc...

This would be the best April fools joke ever, unfortunately it’s October.

I've always relied on the old 'give it a shake' method. If only I'd known this existed!

Can't remember the make, but I had some cannisters that had a scale on the side which you use by floating the cannister in water. 

£16.95 to save using your kitchen scales. 

MSR have floating marks.

The same company is allegedly developing a digital dipstick for measuring the fluid level in your thermos flask.

Is that the one with the laser rangefinder?  I put 150 grand into their kickstarter for the customised blue laser model.

Did it have bluetooth connection to your phone's Health app to monitor hydration levels and a built-in IR thermometer so you don't scald yourself? Count me out if not...

(I am pretty sure a bluetooth hydration flask actually does exists, or at least is on kickstarter)

That's the one; most exciting development in the outdoor industry since the Whillans harness!

Oh yes, it could be very exciting having a Whillans on whenever a big lob was in the offing ...... 'are the plums correctly aligned?' probably being the crucial source of 'excitement'.

I believe it measures the temperature using ramen scattering. None of this luddite thermometer nonsense!

Ramen scattering sounds very messy.

CB

Hell's teeth; it will turn up in Lakeland, that store full of solutions looking for a problem.

Great bit of kit if you don't have a kitchen scales

I have a lot of nearly empty canisters laying around with just enough or not enough left in them for the weekend? So to be safe I just take a more full one to be sure. Because it to me too much doing calculating with a scale, immersing, or etc. Writing with a sharpie on the canister how much is left. 

I have even with emphasis on “considered” buying something like this: https://www.amazon.com/dp/B07DMJBPPV/ref=dp_cerb_1

I use near empty ones for car camping.

Do you know how you are actually supposed to get rid of dead canisters?

Recycling won't take em around here, and they don't want them in black bins either.

I actually use a similar adapter to combine the contents of emptyish identical type canisters. It works, but don't do stupid things when using adapters. 

I've seen a thingy that peirces the canister so then it's just metallic waste. You wouldn't want to create a spark though!

Can't you simply get rid of them as you would aerosols?  If not then just drill a 5mm hole in them slowly, fill with water, empty and dump in metal recycling. Canister metal is soft and ductile to stop them cracking when subjected to an impact so they drill out easily.

Don`t drill. Why use a power tool at all that may cause sparks at the coal brushes? Simply take a robust knife or screwdriver, set it on top of the canister, and give it a tap with the other hand. Also useful for flattening empty canisters before packing them out on longer trips. 

Turn you face away for the unlikely case you get a flame. Never happened to me, though in 40 years. The canister just goes ppfffttt.

I also don't bother filling with water. Just punch a couple of holes and place it downwind for a while.

CB

Here (Germany) they are all in the dual recycling scheme, the infamous Green Point system so they just go in with all the packaging. Mine normally just go in the normal rubbish or the metal skip, their auto sorters and shredders couldn't care less!

Recyclable box is emptied by hand here.  Canisters just stay there.

In reply to all:

Thanks for the advice.  I will try knocking holes in them and see if they will take them then.

https://jetboil.johnsonoutdoors.com/accessories/crunchit

I go as Toerag says. I dump them in the waste TRI (at the separate point) after making a hole with the burin of a Swiss Army knife or the like, so the canister is without the gas. You need a huge saturation before gas starts to burn, so no washing is needed. Iron is separated here after it is collected with strong magnets for recycling. 

Yeah, a "different" system in the UK! Theoretically all packaging can also be returned to the retailer as well, I'd take them back to whoever sells the stuff and let them worry about it!

I just use an old ice axe to make holes in mine. First I make sure that I get out as much residual gas as possible by sticking a stove on and letting it burn out.

I use one of those - bleeds faster than a stove in my experience. Then when the cart is empty I punch a few large, obvious holes using a centrepunch and mallet before putting it in the recycling. Never had a problem.

That looks like a good gadget, and one I'm sure to mislay!

I went with the centre punch idea as I had one handy. Now I just need to wait until next Thursday to see if the canisters finally disappear.

Thanks all.

It's Bonfire Night soon...

Full ones are better.

Probably got rid of it because as the water temperature varies due to the weather so would the buoyancy level. 

Sure, at 30°C water loses about 0,4% percent of it's density which puts us in a life or death situation. On the other hand the metal canister has expanded .....

Maybe we should calculate this... It is a pretty useless way of measuring your gas at 0degC though...

Mine have been collected in Bristol with obvious holes bashed in so you should be fine. 

Quite depends on your country and municipality, I think... Some take them (emptied, crunched open with a can opener) in the metal trash, some metal recycling lines do refuse them outright, some might put them in the "dangerous trash", it depends... Better ask yourself wherever you live (after all, there are human workers on the recycling line sorting the trash coming in, and they might just chuck them into "other trash" instead of recycling if they feel or are instructed to disregard aerosol cans and such - nobody wants their shredder to explode)

I just use a can opener (on totally emptied) canisters (works pretty well), and since our local line won't take them with the other metal trash (I asked) like beer cans and stuff, I just chuck them with some other aerosol cans and every once in a while take them to the recycling centre for "dangerous" goods. Or refill, if you feel ok about it (and know what you are doing)...