Gummi Juice
From Multiversal Omnipedia
Gummi Juice is made from gummi berries; an especially coveted substance in the gummis' world. The juice enabled gummis to jump and bounce like a rubber ball, but had a more potent effect on humans and ogres- it made them superhumanly strong.
It was for this latter effect that Duke Igthorn so desired the juice. Gummi juice (also known as gummiberry juice) was also used as fuel for various gummi machines, such as the Tunnelcar.
