It looks good. Is that a small jar of honey or maybe a jam above the Purrell? And that is a nifty looking little saw, who makes it?
As for the cans, you want to use one doesn't have the inner lining that I see in so many cans now. And just removing it might not be enough, there might be some left in the seam. I can't imagine that stuff is good for you. IF you can find one that isn't lined, and you've scrubbed it inside and out, you should be good to go. I'd suggest using a safety can opener that cuts through the seal, so that you don't get suprised by any burrs down the road.
That being said, if it is for your kit, there are plenty of small metal cups out that there that you might be able to integrate into your system.
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-IronRaven
When a man dare not speak without malice for fear of giving insult, that is when truth starts to die. Truth is the truest freedom.