I bought a boxed set of postcards a few years ago featuring art deco soap labels (from Chronicle Books). To spruce up our laundry room, I framed four of the labels with frames and antique white mats that I picked up from Michael’s on sale.
I found this site that sells actual vintage soap labels. I like the idea of framing anything that is “soap” or “detergent” related. If you use those large bar soaps that come in the beautiful packaging you could just frame those!
If you need art for the kitchen you could use vintage canned food labels. Here are two of my favorites: