This was SO fun and easy to make - and was actually what inspired my whole "Use up the Spring Flowers Patterned Paper resolution" ROFL!!
You can see all the other things I did w/ the SF paper in my gallery.
I get my chipboard coasters from StarLitStudio on e-bay: http://stores.ebay.com/StarLitStudio - I used Medium Weight ones for this box, she also sells lightweight ones (those are great for die-cutting! *wink*)