Who here likes useful tools?

It's a hand warmer; the metal disk inside the gel is curved, kinda like a sattelite disk, so when you press it hard enough so that it CLICKS, it sets off an exothermic chemical reaction in the gel, temporarily solidifying it while ALSO giving off heat.
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Sorry if that sounded too nerdy. :P

Nothing is too nerdy on Funsubstance :)

When I went to a schooltrip, my mom would hide the big money in pens and (used, dirty) lipgloss xP

I didn't see one, but they don't have all the items. I'm ordering the micro screwdriver set and the cash roller thing off eBay :), that'll attach nicely on my computer bag