I also have “the rainbow mug”! Found it at a goodwill several years ago and recently saw it make a cameo in the newest season of Stranger Things! : r/ThriftStoreHauls
Rainbow Mug Vintage FTD Coffee Cup 1980s Gay Pride Classic | Etsy | Mugs, Coffee cups, Ftd
Mug en Porcelaine Somewhere Rainbow – Arc-en-ciel – CHASY
Amazon.com: Old & Bold Retro Pride Rainbow Mugs - 6 Pack of Vintage 11 Oz Rainbow Ceramic Mugs - Rainbow Birthday LGTBQ Party Supplies Decorations Decor Rainbow Pencil Holder - Pride Month : Home & Kitchen
FTD Rainbow Coffee Mug Pair, tasses arc-en-ciel vintage, décor arc-en-ciel, tasses à café vintage des années 1980 - Etsy France