The Grapevine is a food COB that injects near the Creatures 1 watchtower, opposite the waterfall. It was made by Stefan Kuske and could be downloaded from Albian Critter Litter, and is now available here.
From the readme:
The sweet fruit of the grape for your norns. The grapevine is located near the light house. If a norn eats a grape, it has the following results to the norn:
- Grape Vine, a C2 COB and C3/DS agent