In the Harry Potter and the Chamber of Secrets (video game) for consoles (except the PlayStation version), when you buy the Bertie Bott card, Fred and George will mention an unreleased "Dog Spit flavoured bean".
In the firstfourgames of the series, the beans were used as currency. Each game, save for the PC versions and the first two PS1 versions, usually has a certain limit that shows how many beans the player can pick up at maximum (that can be increased by finding/buying a Bertie Bott's Bean box). The first game involves up to 100-to-150, the second game allows 100-150 as well (only the PS2 version enables a second bag to be picked up for 200 beans total), and the third game due to the trio's full involvement in being playable, enables 250 beans total to be carried.
In the first three games, the beans are spent at Fred and George Weasley's shop at Hogwarts. While in the fourth game Cigarettes Online Free Shipping, they are spent at a card collector shop accessed outside of gameplay (though in the GBA version the shop is named "Weasley's Wares").