If you are on Amazon Prime members, through May 31st choose FREE Amazon No Rush Shipping at checkout, and Amazon will automatically apply a $5.99 Prime Pantry credit to your account once your order ships!
Keep in mind that the delivery fee for each Prime Pantry box is $5.99 so this credit essentially gives you free delivery! Simply fill up your Prime Pantry box with items you want to purchase, and Amazon will automatically apply the credit at checkout.