Merch needs some fresh ideas. I remember when I was dating my now wife, she did some house sitting for a friend. She was feeling snacky and microwaved some popcorn, only to later discover that she had eaten her friend's Josh Ritter-branded popcorn memorabilia. Stuff like that, or the iron-on logo that we got with one of the CT packages, that's what I like.
I would actually appreciate something ephemeral like that if it was creative (and good). Just off the top of my head, here's a few ideas that are probably too punny for the likes of Matt & the Dessners, but:
The National Lemonheads
Bloodbuzz-Orange gummies
High Violet lavender CBD
I Should Live in Saltwater Taffy
I dunno. Miss me with sweatbands & pencils though.