The Salivatrix is the cap for a Dannon yogurt bottle. It is found on Sublevel 6 of the Snagret Hole and is located in an alcove, and may be behind a gate, make sure you use Blue Pikmin if appicable and deal with enemies such as Burrowing Snagrets if appilcable. On the cap it reads: DANNON FRUIT ON THE BOTTOM SAME GREAT TASTE!