"Who loves orange soda?!" Hopefully not your grad, since you dumped it all out to fill the bottle with money. Think of it as saving a bag! And they'll get an extra 5 cents when they recycle this bottle. Look at you guys being all earth-friendly and stuff.
This combines two of my favorite things: candy and money! And since you're already giving them sweets, they can spend that dough on something they're really going to need””like resume paper since they need to get a job.