I keep mine in a car kit because of the weight, but have pulled it out occasionally for impromptu hikes.

I did manage to melt the plastic lid that BestGlide sells by using two Esbit tabs at once while on a wet, cold lunch stop for a faster cup of tea. The lid bubbled up along the side where it touched the outer wall, and when I managed to pry it off a glob of liquid plastic stayed put in that spot. It popped off after it cooled, but there is still some residue on the PTFE coating.

Heavy duty aluminum foil makes a better seal and is harder to melt.

The packing issue is annoying, but I do like having the space in the pouch for a few more items. I carry 3 Esbit tabs, 6 Pur-tabs, aluminum foil, tea bags, sugar, bouillon and a lighter, and usually leave the plastic cup at home. Why would I need two cups?