"Back in the day" we used the small gravity waterers with paper towel or sponge in the basin to water our crickets. It worked ok, until a cricket would find its way through the hole and drown itself in the bottle (they're not the brightest bulbs in the box). Then they'd die, rot, and the water fouls. But I'm wondering if we could use those again with our roaches and fill the basin with water crystals instead. Has anyone tried this? Does it work, and do the crix/roaches stay out of the bottle?