Once you've received your preview email, you can log into your account and add or change the beers in your Drop. Changes to your Drop can not be made until the preview has been sent. This is due to rapidly changing beer availability, we'll send your email the second our breweries have let us know what is available for the week.
To make the changes , log into your account and click the View Drop link in your Beer Tracker for your upcoming Drop. The ability to swap is only available to Plus and Ultimate members. Basic level members are able to add beers to their Drop at no extra shipping cost.