fishstix

The bottles would do it to you then. yes they will help keep the temperature steady for a longer period of time (meaning they will fill up cubic ft space) BUT - the down side is the the bottle will condensate with the temperature fluctuations.

On a side note: get those cabs off the bottom if possible. At the very least raise them with a spare empty box. I almost lost a box of siglo II's because I had them sitting on the bottom.