I picked this up at RT-Mart on a whim because I liked the funky vintage can.
I got quite a shock when I used it, though, because the powder is mentholated and it gives you a pretty sharp chill when it touches your skin. I kind of liked it on my chest on the stickiest days, though.
I wondered why this product was made, and then I found it in one of the stories in Sightseeing by Rattawut Lapcharoensap. People in Thailand (and evidently other hot countries, as I bought it here in a can with a Chinese label) use cooling powder to stay comfortable in the heat and humidity.
A fortuitous find. Just don’t put it down your pants.