Ice cube trays from Dollar Tree

I bought a pair of blue ice cube trays from Dollar Tree for $1.  These trays are designed, for some reason, with alternating sizes of ice cubes.  This really isn't a problem, because the size of cubes doesn't matter to me as long at they fit in my glasses.  The plastic of these trays are stiff but pliable.  I occasionally have a problem getting a cube or two out of the tray.  Similar trays I have used for about 4 weeks now are showing signs of plastic distress in the form of lightening of the plastic around the cube depressions from all the bending to remove the cubes.  We shall see how long these original trays last.  Until failure, however, I would call these a good buy.