The Milo lorry truck tastes different is because of the paper cup. Try using the same type of paper cup that the truck uses and you get the same flavour. If you want to know if this theory is true or not, bring your own Mcdonalds paper cup and pasar malam plastic cup. Then go to the truck and ask the vendor to make same cup from these 2 cups including the cup from his truck. Then you understand why. The fresh paper cup releases an aroma that got mixed into the Milo. Thats why the after tastes is different than ceramic or metal cups we use at home.