Open up for bonguri case (apricorn case)
select up to 3 bonguri and drag them into the shaker.
then walk around or go for a quick ride. they shake really fast into a drink, maybe just one lap of the circuit.
it'll give you 3 drinks to use to boost stats, or you can mix in more apricorns to adjust the flavour/stat boosts.
if you buy the ones from the drink lady they'll most likely add to one but take away from another stat, so its best to make your own.