Have you booked the cruise already?
It's only 20euro per day when you choose the 'all in' price category to get the easy package when you book.
After you booked the cruise, the easy package costs around 32euro per day.
If you are going to have a couple of drinks per day, then they easy package will be more than worth it.
A glass of wine costs around 6euro plus 15% tax on board, a glass of Diet Coke is around 3euro, a bottle of water 1L is around 3euro. A cappuccino is around 4euro.