Weebles wobble but they don’t fall down! And neither will these shotglasses because they have a divot in the bottom so they can be placed on a tray with pegs. Seems like a pretty decent idea, as those shots of Grey Goose or Cuervo aren’t cheap. Drop a tray of those and the bar is out some major cash (profitwise, not on a cost basis, they mark those pricey drinks up like crazy).
Of course this might encourage your servers to feel free to take a few shotglasses for themselves since they no longer have to balance things too much. Boozy shot girls that won’t spill your shots? That sounds like a win-win for everyone.