Why not make a necklace with a fully functional can opener as a pendant? This can opener has been in the kitchen drawer for a very long time but recently I noticed its potential as a base for a resin pendant. I used an image of a retro gal on a swing with clouds in the background, ice resin, and added a few rhinestones to fancy it up. I mixed it up with a piece of a rosary with beads and charms I had in my stash.

Yes! It really does still open a beer quite effectively and it quite a hit at parties. Creating a piece of jewelry using a digital keychain breathalyzer would also be a hit at parties but much, much more challenging aesthetically. 

A friend gave me a vintage wooden ruler with a metal strip on the edge and challenged me to make something with it. I used the metal strip as a base for this pendant. Here's how I did it:
1) I removed the metal strip, created a teardrop shape then wrapped the top with wire. 
2) Traced & cut the shape from a vintage dictionary page, then filled it with Ice Resin.
3) Used Glue 6000 to glue vintage rhinestones around the edge. 
4) Attached the pendant to a vintage rosary. 

I've been teaching jewelry making classes for about 10 years. During my last class one of my students asked me why I never wore any of the jewelry I made to class. I was a little embarrassed and finally answered very honestly "The jewelry I make to sell doesn't express who I am. Next week I'll make something that does and wear it here". Because I am a mixed media artist it was clear that I needed to make some really quirky mixed media jewelry. I found these books really helpful in my journey to make unique pieces:
Semiprecious Salvage by Stephanie Lee
Resin Alchemy by Susan Lenart Kazmer
The Jewelry Maker's Design Book by Deryn Mentock
Making Metal Jewelry by Jen Cushman