The magician shows one prediction in an envelope. the magician then shows some drink names on cards Spectator rolls a pair of dice to remove cards until there's only one card still on the table. Now the magician reveals the prediction exactly same as the drink still on table.
+Easy to do
+No special cards No special dice
+Everything can be examinable
+Easy to do
+No special cards No special dice
+Everything can be examinable