Groupon provides specific Degusta Box landing pages in order to enter your Groupon code. You can find your redemption code in a pdf file in your Groupon confirmation email. The landing pages are present in the Groupon offers as well as in the pdf file.
1 month offer: Click here.
3 months offer: Click here.
Ensure to enable "I want to use a promotional code" in order to enter your Groupon code. Please note that you can only use a Groupon code as a new customer.