Haha this would be funny as a gift - DIY Bacon Candle - have the smell of bacon any time. (Instead of drilling a hole for a wick, tape a wick in the center of the jar before pouring the bacon grease in.
Vintage china can be used in so many ways at a wedding reception. Here's a creative way to turn them into candles. You could also just put a tea light inside them, instead. Candles Made from Thrifted Teacups Wedding Favors Your Guests Will Actually Want