"pony in a cup" and "cup of pony" should be merged

Normally for a low-use tag like pony in a cup (12) I’d just clean it up to the established cup of pony (524) but because it has a more intuitive wording, shared by good company like pony in a box, pony in a bottle, and pony in a basket, perhaps it’s worth an alias. For that matter, I’m unsure which ought to be the tag that’s preserved.
 
Bonus: mug of pony (6), which is even set up with implications, is just an extra-specific version of cup of pony and should get that as an implication too, or just outright aliased into it, IMO.

Aliased. I might come back to this later, as things are in a weird state.