In English you distinguish between much and many: Much water, many bottles. Water cannot be counted whereas bottles can. In Danish the distinction goes further, besides from meget/mange (much/many) you distinguish between nogen/noget (any) and mere/flere (more).
Tomatoes are countable, milk is not.
Please notice that noget and nogen have more meanings: Besides from any, nogen translates into anyone, someone, anybody, somebody, someone, and noget translates into some, something, anything.