Homebrew PCBs

I realize that a glass container would be safe for the storage of CuCl
etchant with respect to acid resistance, but breakage would be the
obvious problem there.  What sort of commonly available containers
normally intended for other uses would be safe to store this type of
etchant (I've always used FeCl3 etchant in the past). 

From what I can find about polypropylene's (PP) resistance to HCl:

http://www.lamtec.com/chemical-resist2.htm

it appears that containers marked PP (like the common plastic food
storage containers one can find anywhere) might be OK for use as
etchant tanks/baths, but I wonder about the suitability of PP for
storage.  The sealing methods used on the PP food-related containers
I've seen that were designed for the storage of liquids don't look
adequate for the storage of an acid (dropping a container full of
orange juice and making a mess because a spout pops open is one thing,
having HCl spray all over your floor is an entirely different sort of
thing).

Of course, it goes without saying (but I'll say it anyway) that the
use of food containers for storage would require that they be clearly
marked with the words "POISON" and "ACID" in large, bold letters (in
addition to the words "CuCl Etchant" which wouldn't mean anything to
most people) and kept out of the reach of children.  And, for that
matter, any container used should be marked as such.

Anyway, what are those of you who are using this etchant using for the
safe storage of it?