T_Co and Ironraven

Great idea on just using aluminum foil for a lid. That ought to work pretty well as an improvised lid. Plus - you can buy heavy-duty tin-foil, and double it if you need to. I also like the idea of improvising a lid from the bottom of a coffee can. I have no idea why the people who make SS cups don't make a decent lid for these things.
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Hikermor said: "Real men don't get thirsty."

Yeah ... they just stay in the mountain bar and drink Corona's - and watch with amusement as the dehydrated hikers plod in at the end of the day.

Pete