Tbh, the self-funneling pics/vids seems missing the point so much for me here, not very different if they drink it from a jug or bowl.
Like, all the hotness from this idea comes from submissiveness, when its not to her decision what amount of it flows through the funnel, how much she swallow and eat, how much fatter she will be
Without someone else to lead the scene it just seems like a pointless prop