One great way to level up your float is to replace the Guinness with ... For a caffeine kick, Shelbert suggests that "you ...
If you have an espresso maker, you're well on your way to a sweet and fizzy drink. Here's how to use soda water to make a delightful espresso float.
you don't need to limit your ice cream float hacks to just soda. Other McDonald's beverages like coffee and orange juice work for this as well. With the OJ, it's mostly business as usual.