IMO, the novelty will wear off in about a week, and unless you have a large family and are planning on making a lot of dairy products from scratch (very time consuming), you cannot possibly use all of the milk - unless they are a really low producer, then what would be the point in having one? And what others said...twice a day, every day - and it borders on animal abuse to be "late" about it. Perhaps you should volunteer to milk someone's cow for a week, then make up your mind.
Otherwise, any stainless steel bucket of the appropriate size that can be sanitized and is made in the US will do.