I like to use the hinged Styrofoam containers that have a closable top. I
get these from a supply house that caters to restaurants and caterers.
They are useful to keep acrylic from drying out. when you are finished fro
the day soak a paper towel in water and lay it over the bottom piece cover
and push the tab in on the top. The moist paper towel will dry slowly
keeping the acrylic moist as well. This has worked over a weekend.