Plastic No. 20 by Melinda Windsor is a free groovy display font with a soft 1970s bounce. The letters feel poured and slightly inflated, with chunky curves, rounded corners, and a gentle rightward lean that gives the whole design a lazy, melted rhythm.
It works well anywhere you want that retro pop mood to do the talking: record-inspired posters, bold packaging, event flyers, storefront graphics, and short logo lettering. As a free font, it also suits title cards and cover lines where the thick, blobby shapes and compact spacing can carry a few words with real period flavor.