Homemade coquito is good for two to four weeks in the fridge. Boozier batches last longer. Egg-free versions last longer. Freeze it to stretch it to six months.
But don’t overthink it. Life is short. Coquito is delicious. Make a batch, share it, and if you’re ever unsure, just sniff it. Your nose really knows.
Now go forth and sip responsibly. And maybe hide a bottle for yourself. You earned it.