One thing everyone forgot to mention is, crickets are cannabalistic, if you dont give them a way to hide from each other, they'll eat each other if theres no food.
I buy 2 dozen crickets once a week, adult ones from the lfs.
I keep them in a plastic container, the ones from the petshop that are blue-ish and sell them for betta kits or w/e
I feed them chopped up lettuce and/or carrots ever other day or so.
they dont drink water the way we do. Crickets dont drink period.
they get moisture through their food, so veggies like carrots and celery are best, vascular veggies that have a lot of water content.
I also spray the egg carton with water so when they chew it, they get some moisture.