Nice work.
I have made similar but smaller ones without raised sides to use as hot pads. Great gifts.
It looks like you did what I have done by cutting the corks in half length wise and saving the side with the labels on them. I cut mine on the band saw.
I have even made them as kits. I make the wood part without the corks installed and given them to people to glue the corks in themselves in their own pattern.