Cool, I went to the store and bought a 50ml bottle of probiotic coconut milk. Task done?
milk (noun):
1. A whitish liquid containing proteins, fats, lactose, and various vitamins and minerals that is produced by the mammary glands of all mature female mammals after they have given birth and serves as nourishment for their young.
2. The milk of cows, goats, or other animals, used as food by humans.
3. Any of various potable liquids resembling milk, such as coconut milk or soymilk.
You get what you asked for, or you didn't sufficiently define it.
There's nothing worse than a task where you can deliver one item and then have to rely on someone else to be able to deliver a second. Was once in a role where performance was judged on closing tasks; getting the burn-down chart to 0, and also having it nicely stepped. Was given a good tip to make sure each task had one deliverable and where possible—be completed independent of any other task.
Why would you write down "Buy Milk", then go buy whatever thing you call milk, then come back home and be confused about it?
Only an imbecile would get stuck in such a thing.