If you don't have glassine you can use regular envelopes or something like a bank envelope (those that the bank puts your money in) not the deposit envelopes. Then, put the envelopes into a plastic container so the frig doesn't dry them out. I use the door since it is warmer there. Actually, 2 years ago I bought a cheap wine cooler so that I can set the temp.
You can also keep them in a dark cool room, but they do need to eat. I also mist a couple of time with water so that they can take some water from the netting. There should be some info on the forum on hand feeding them. If you don't have enough flowers, you may need to hand feed them. Putting in dishes of juice or fruit, may get their wings sticky.
Herndon, VA (USA)
Take care of the small things....