Considering the 'default' (for lack of a better word) MoGal setting has sapient robots in it, I think we can assume it takes place not in our time, but sometime in the near future. Which might be how Kuchisake Onna's 'flashback' here takes place in our time.
Girl defies physics to do that. Like, you can't suck the boba with two open straws on both sides of your mouth. You can, however, shoot bobas from those two straws by plugging the center straw with tongue to let the pressure build.