I stamped white paper with two colors blue (one for flowers, a darker for the letters) then attached it. To keep it nice and keep it from falling apart, I covered it with a couple strips of clear packaging tape. That's why it's so shiny!
I like the containers because they have the metal across the top for leveling, which makes it easier for my little girl to help me measure in the kitchen, and I think they're the perfect size. I'll be saving these container every time now and making more!