Please follow these steps:
Visit www.crazycups.com and type in the word "Groupon" in our search bar. 3 items will show up, so pick the pack you purchased on Groupon and add it to your cart. Go to checkout, then copy and paste the voucher code that Groupon sent you into the coupon code field in your cart and click to apply. You should be good to go! If you have any issues using your coupon code, email info@crazycups.com and we will be happy to help.