When I externed for The Brass Elephant, we made them in mini cup shapes once a week. They were stored a fish bucket. They actually seem to keep just fine.
A trip down memory lane... When I worked there, I made myself a stencil from a plastic lid by trimming off most of the lip, leaving just a small amount left which left me something to grab onto. Then cut out a circle in the middle of it. This helped me move a lot faster, but I could still only do no more than 6 at a time. I would take them out of the oven (which was placed in a hard to reach area), start yelling "HOT PAN! HOT PAN!" to clear everyone out of my way, then manuever myself around the kitchen and run to my station to form them between tiny brioche tins. At first I could do no more than 3 or 4, but was soon able to work my way up to "the standard amount", 6 being the amount Lord **** Chef thought you should do at a time, as anything less was a reason to get yelled at. :p on him!