Apparently someone sued Pepsi claiming they found a dead mouse in their bottle of Mountain Dew. Pepsi counter claimed with a statement from a scientist that a drink of that acidity would dissolve the mouse to the point where it wouldn't be recognised as one after 30 days.
Someone has decided to see if this is true, and is also testing various other soft drinks (and using Evian as the control).
@RenThing: It's a step in the right direction, but feels like a half-assed job. They've still not dealt with the rather massive issue of situations where the victim is forced to penetrate their attacker.