What do you put in a fat mail?

Hi! I’m new here and just join a big envelop group. So I would like to collect some ideas​:rofl::rofl:. And would you like used or unused stamps in a fat mail?

As far as I can tell, fat mail could have anything that fits in an envelope. Examples include, used stamps, postcards, pen pal paper, tea, and stickers. I think fat mail depends on the person. For me, I’m not a stamp collector so I’d probably just give them to someone else but stamp collectors would love it I’m sure!

Thank you so much😊!