Sorry if this is too serious for an otherwise playful post, but I grew up on a farm and teaching calves to drink milk is relatively easy, but they aren't born with the skill and the process ends up pretty humorous, as the video shows. Basically, a newborn calf wants to drink from a teat, naturally. A bucket of milk has no teat so you have to stick your arm into the milk with a finger or two pointing up, causing the calf to suck on your fingers which will, of course, cause it to consume the milk as well. After a few tries you don't need to use your arm anymore, but they'll bury their whole head in the bucket looking for the fingers and figure out that just sucking into the milk works too.

But yeah, it looks kind of silly and I've seen calves bury their entire heads up to their ears in the milk, kind of splashing the entire bucket around pushing against the walls desperately looking for the "teats".