All you need is printed papers, double sided tape or mod podge, ruler, scissors and embellishments.
The photo above the paper was stuck on with Mod Podge. They came out well but I found the end result was a bit too shiny for my liking.
These ones were stuck on with double sided tape and I love how they turned out.
These tins can be used for holding anything besides pens. They can be used as vases, for loose bits and bobs and whatever else you can think of.