Um, duh. Well wait, perhaps gently point out that the reason oat drink doesn´t taste like milk is because it isn’t milk, which some people might consider a good thing. Oat drink is made from (brace yourself dad) oats, refining the best of the earth and turning it into a pretty great beverage for multiple occasions. Since dad has probably been drinking cow’s milk since he was a toddler this plant-based innovation may appear scary at first, but you might mention that even great new things take a little getting used to, just like CDs, laptops, cable TV, and so on. Embrace the future dad, it´s an amazing thing if you allow it to be.