There is no charge for swapping beers in and out of your Plus and Ultimate level membership.
Beer Drop makes beer from all membership levels available to swap into your shipment. If you remove a beer and replace it with a beer that is the same price, there will be no additional cost to your Drop.
If a more expensive product is selected as a replacement, the difference between the price of the beer removed and the replacement selected will be displayed as an upgrade on your Beer Drop total for the month.
Upgrade pricing from swapping in higher priced product and additional beers will be indicated on the Upgrades line in your Beer Drop Breakdown on the swap screen.