A fruit juice company tags their fruit juices by concatenating the first three letters of the words in a flavor's name, with its capacity.
Create a function that creates product IDs for different fruit juices.
get_drink_ID("apple", "500ml") ➞ "APP500"
get_drink_ID("pineapple", "45ml") ➞ "PIN45"
get_drink_ID("passion fruit", "750ml") ➞ "PASFRU750"