Coastermatic is a brand new service that lets you print your Instagram photos onto round sandstone coasters. I just ordered 4 and I am impressed at the ease of picking the images and the well designed check-out process. My favorite is the confirmation screen (above) that shows my 4 picks in a box.
Coastermatic is a side project by Brooklyn-based SVA MFA Interaction Design Students Tom Harman and Tash Wong. I am impressed!