I have some cups made for large birds like parrots etc. and are terrific as they hook out of the way and I can use one for water one for food.

I put this picture here as it shows one of the cups. Some pet stores carry them but they're getting harder to find and when I do find them I usually buy a dozen or so to have on hand. Hope all goes well with handsome little Mowgli at the white coats tomorrow. I have great luck getting ferals out of the cage and to the vets in a laundry bag with a cinch cord. Not only does it calm the cat down, but the vets can also tranq. them and do the needed shots etc after without any extra stress on the cat.