My instinct is to just end mealtime/snacktime right there, but about half the time, she does eat the soggy food, and we've struggled with her being underweight, so it is very hard for me to cut short her opportunity to eat (and, she really won't care -- she would probably be happy to get down from the table). I guess that's part of my struggle, too -- it seems like there's more actual eating and drinking when the open cup distraction is not there.
Does anyone have any tips or advice? She's also started asking for a lid (No! Lid!) sometimes if I bring her an open cup, which for some reason makes me think she really needs to be weaned from the sippy. So - I don't know if I should just let it go and deal with the mess/waste (maybe it'll cool down and we can start eating outside again) or calm down on trying to get her to do it -- nobody drinks from a sippy forever, right?