Sick and tired of "plastic" storage containers.  They just never seem clean.  So I ordered two sets of the Pyrex glass container sets.  The sizes are just what I wanted.  And, although somewhat difficult to remover, the lids fit nice and tight.  I have a sacred rule in my house that when a container comes out ot the dishwasher the lid goes on.  If you are missing a lid?  The bottom part gets thrown away!  
These stack nicely to save room in my cupboards.

Pros: Good quality.  Great sizes.
Cons: None.