DIY Mercury glass mason jars. Looking glass spray paint, equal parts vinegar/water spray bottle. Spray with water mix then add light coat of spray paint. Allow to dry. Use a paper towel to wipe away bubbled areas for completed look.
Spray paint pine cones to have that mercury glass look to them. Use Krylon Looking Glass Mirror-Like Paint on pinecones, add a little fresh or faux greenery to accomplish this look.*** 10/10** this link really doesn't tell you how to do this, but it's pretty self explanatory (try adding some white twinkle lights in the bowl or apothecary jar - so pretty!)
Spray wine bottles with water. While still wet, spray with Krylon "Looking Glass" spray paint. The water will keep the paint from adhering completely and give the "splotchy" look. Then, you can etch the words! Hoping to make something like this soon :)