Another idea for adults that I had forgotten about - quilted coffee mug coasters. I had made one for myself years ago after I'd made one mess too many - coffee/ tea rings on office paperwork is never a good look! I have fabric and batting in my stash and can easily whip up a couple. For an inexpensive gift for a workmate etc, you could give a nice dollar store mug along with a coaster.
In the past, I've also made a quilted placemat, with little pockets for cutlery and a string to tie when it's all rolled up. I made one for use at work, when I found myself eating lunch at my desk on a regular basis. Add some inexpensive cutlery and this too could become another workmate gift
If you want to make the coaster or placemat seem store bought, print a wrap around label on your home computer. "Designer Mug Coaster" or "Placemat-To-Go" come to mind as possible wording options. I'm sure I could come up with more creative wording when I'm functioning with a "full deck". My brain's a little foggy from the cold meds I'm currently taking!