Sweet Filled Chocolate Coca Cola Bottle.
Amazing way to save piping bags!!! https://www.youtube.com/user/thedomesticgeek1
DIY Cake Designs: Brush Embroidery Cake Tutorial
This be perfect for when they need a reason to smile, or he could always look back to for when you guys fight. Plus it has real meaning to it.
For more ideas, go here: http://www.ldrmagazine.com/blog/2015/01/22/put-inside-open-letters/