I transferred from a middle school in a different county and showering was required at their junior high. Compulsory fully nude showers seems kinda weird looking back Not that long ago either, pretty sure it was well after that was a common practice.
Crimping and folding it around the edge of the pan or the foil itself. Foil can hold in the steam of a pan in the oven or a foil pack on a campfire, for practical purposes that's air tight. If you're trying to contain superheated helium then it's a different story.
Yeah its exactly like a Pokemon. I had no idea they went "kiwi kiwi" in a cute voice like this.