I stumbled on Heidi Annalise's tiny art out of old Altoids tin boxes and became completely enamored.
I was intrigued with Annalise's method because she uses oil which is similar to acrylic, the medium I use. She shows how to make one of these tins in this article, where she also gives credit to the amazing artist Glenn Dean, where she got the idea from.
Using an Altoid tin for a travel paint kit is a pretty common concept for watercolorists. You can find tons of information on Youtube for how to put one together.
But finding a how-to for acrylic painters is a bit more difficult. I was happy to stumble on Heidi's post. I'm almost done with my Altoids and can't wait to try it out. I'll be modifying it for acrylic paint and I'll let you know how it goes.