Wrap it with Twine. You can decorate mason jars in endless ways but these twine ones make stunning centerpieces. Here is the DIY mason jar twine, but feel free to adapt it to add lace, doilies, even chalkboard paper
This is so pretty.wrap some high quality silk flowers around a faux birdcage and you would have an instant and unique decor piece. Smaller birdcages with fresh flowers would make adorable centerpieces.