I saw this really cute idea I fell in love with for a wedding present (which was how it was used on the blog I found it) or maybe a wedding gift or maybe an anniversary gift... lots of options:)
Make or purchase a wine box, each person writes a love letter, purchase a wine that will mature over time, place everything inside the box and nail it shut!
If you and the significant other ever get into fight that makes you want to walk away from each other. Go to the box, drink the bottle of wine and read the love letters to each other. Problem Solved! Well at least for the night:)
All the best,