They don't use Slugma silly!
They use Torkoal for barbecues
and they use Glalie for Soft-Served yogurt (with berries of course!)
aaaaand they use Snorlaxes to squash the berries for juice!
So many berry foods! this could be called the "Berry Recipie Thread"
Anyway, like sNOwBaLL said, they swallow it, reguritate when needed, then swallow it again >_<