2 x 4 inch Viewtainer - White
I have found these to be very handy, particularly the small ones - You can see at a glance what you have in each one so there is no pulling lids of only to find the wrong thing.
They are very convenient to use - look very neat on a shelf (gives the impression my shelves are neat when they are not) I have not yet seen the full range of sizes but I know they have many.