Editor's Notes & Price Research
Valid on the first order for new Google Express customers. Be sure to check to see if there are any delivery areas near you before purchasing.
Site has for their New Groupon Customers: $40 Google Express First Order Voucher for New Google Express Customers on sale for $15 - 50% w/ promo code DRANK50 = $7.50
Promo code: DRANK50
Certain cities might sold out on the voucher, the one that is working that I know of is from los angeles / orange county google express.
Good luck, might not work for some.