I never drink anything from any customer unless desperate - I've seen worse in my time. Cats with their sh itty arses sat on draining boards, dog slobber everywhere, cat litter trays in the kitchen, cat fur and grease all over the kitchen window where the cat rubs through an open kitchen window and walks over the kitchen surfaces, hounds mounds all over the garden, nappies on the floor, in the garden etc. Even had one customer pickup a fresh dollop of cat poo with his bare hand then offer me a cuppa
Peoples hygiene levels are not as high as my own.