Hello Tom,

Why not make your own "Varroa Blaster" out of a food grade plastic juice
bottle. No harmful residues. Cheap or free and easily replaceable if
damaged. Some assemble required though :>). You can heat a frame nail and
melt a few small holes in the lid rather than drill them. The piece of
nylon stocking between the cap and the bottle will trap any sugar clumps
that would plug up the holes so there is no sifting or high humidity
impacts.

Best Wishes
Dennis Murrell