Takeaway Container Question
Typically polystyrene takeaway containers have ridges on one of the two halves of the container. Should the ridge side be the lid or the base? More often then not they are used with the ridged half as the lid. I'd think though you'd want the ridged half as the base to collect condensate if the item were hot.
Ha, I think about this all the time. We eat at the same Chinese restaurant every week and we always have leftovers and they just give you the containers to pack up by yourself.
I usually put the ridged side on the top because I don't want the sauces to get caught in the ridges.
I bet there is a reason for the ridges; who knows.