Catan tile coaster holder

I made my own drink coasters by sticking 2 Settlers of Catan tiles together back-to-back and coating them. They have been functioning for 2 years now, and now that I have a printer I decided to create a holder for the coasters. Here's the result. In theory it can hold 10 coasters, depending on how much glue you've used in between the tiles ;)

It might be a good idea to add a little lip for the last coaster, since it has the tendency to slip off sometimes