Homebrew PCBs

I'm about to start using CuCl for etchant and was wondering if a 
plastic container marked "HDPE" (and a "2") would be suitable for 
doing the etching. The plastic is fairly thin but I plan to brace it 
with a frame around it.

I'd want to store the etchant in the container for an extended period 
of time with some sort of a lid. 

Any thoughts or suggestions as to how well this type of plastic would 
stand up to the CuCl?

Thanks, Bob