Mur - it was made by Squinge, so it's probably somewhere in his section here at Insim.
Since this would require new animations, I don't think it will be done. (Yes it will most likely require new animations, because toddler and infant skeletons are not the same...)
you could try
this (
booty)? Maybe recolor it so that it looks a bit more "cave-ish"...
Also, there's an
invisible recolor of the bottle. At least it's a bit better than the green one. There's a self-exploding bottle hack at
Simbology (so that you don't have to worry about invisible botles hanging out on the floor)

There's also a more native looking default replacement bottle in all the
CS conversions at MATY. Probably other things that could prove handy there, too - since there are a lot of CS (castaway stories) conversions for TS2 there.