They may be 'partial to it,' but you shouldn't give cow's milk to cats, especially not adult cats. You should only ever give them a bowl of water, as per dogs.
Most cats are lactose intolerant. This means that they don't have the enzymes needed to digest the lactose in milk. Lactose is a type...
Yes I'm sure if we put you in a room with a lion or a bear, or in a pool with a great white or a crocodile you'd come out top of the food chain. #GoodTimes
One problem with a lot of milk alternatives is that many of them contain crap like stabilisers, sweeteners etc. Oatly and Rude Health are two that I'm fairly sure don't, not sure about any others.