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.
For cheap, yet effective, bobber for light-tackle fishing, use a foam earplug. Just thread the hook through and slide it to the desired position. You can make it a slip bobber by inserting a length of plastic coffee stirrer.