Helen. 'my' modification was intended for houseflies and blowflies. They need a larger type of bottle, and they may be a smidgen smarter than fruitflies. They don't drown themselves in a glass of wine, for starters! The wee sunshade is because they sometimes can find their way out again if the way is light. Bottles shaped like the old 'Coke' bottle snap together neatly.

I find it reprehensible that the housefly strolling on the butter is fresh from a walk on the dogshit next door.
It's not even OUR dogshit!