My darling friend Kate Williams has dubbed thee 'The Caster Master'
 
This gadget is for placing your casters inside the enclosure so they can hatch in there, saving you handling with live prey. 
You can visually see when the casters have hatched with the 360 clear cup.
The cup has vents at the bottom to allow any accidental water to leave and to give the casters all the ventilation they need.
Mini suction cups to keep it in place.