There is a new delivery area for Google Express called the Midwest. Using coupon code “MIDWEST” you can receive a credit of $20 Off your order from one merchant and choose Express Membership for 3 Free Months or $4.99 for Delivery fee. Probably new members only.
You must choose all your product from a single merchant (do not forget about taxes). Keep your order under $20 including tax and with the credit you will not have to pay anything