Yes, I’ve done that before. You can also try it with a paper dixie cup if you have some, or a paper bag. Thicker paper is more sag and water resistant. Here’s a how to I made of how to make a paper cup out of a flat sheet of paper (like a map) that could be used to boil water: How to make an easy origami paper cup – could be used to boil water

Hmm…I just checked that thread, and the pics are loading for me…if they don’t load for anyone else either, lemme know and I’ll check the links and code.