UK Costa recently introduced new items to their menus, including three flavors of hot milkshakes. Yes, you read that right. While they are not currently available in the US, hot milkshakes are quickly sweeping the UK and worldwide social media. But, since you can’t try them, I took myself to my nearest Costa and bought all three! What are the hot milkshakes?The “ground-breaking” new range, described by Costa as “unbelievably good”, is exactly what it sounds like. It’s a thick milkshake, but hot! They come in three distinct flavors; White Chocolate and Strawberry, Salted Caramel Coffee, and Cho…