To get Add On Items without having $25 of stuff in your cart. I got this message when I checked out with an add on item in my cart without have $25 in my cart. A Prime member perk, apparently. Amazon Day Important message Add-on item(s) ship FREE with Amazon Day delivery OR with $25 of qualifying items. Choose your Amazon Day below. Learn More Your Amazon Day 1. Pick a day of the week that works for you 2. Order items throughout the week and choose Amazon Day Delivery 3. Get your weekly orders delivered for FREE on that day each week Choose your Amazon Day Mon,Tue, Wed,Thu,Fri, Sat Amazon Day will appear as an additional ship option along with your regular Prime delivery speed options.