A medium size McDonald's Frozen Coke Float (i.e. -- frozen Coca-Cola garnished with soft serve ice cream) currently costs a pretty hefty $4.50. Here's a sneaky hack to get an even bigger version of the same dessert for just $1.30.
To take advantage of this scam, you'll need to find a McDonald's and Hungry Jack's store in close proximity to each other. Firstly, purchase a large frozen Coke from Hungry Jack's, which are currently on special for just $1. Then, grab a 30 cent soft serve ice cream cone from McDonald's.
Once you have both products in hand, simply slurp down some of the frozen Coke and add the ice cream to the cup for a saving of $3.20:
You now have a larger, cheaper version of the same dessert with a bonus ice cream cone to munch on. Alternatively, you can cut McDonald's out altogether and order an ice cream cone from Hungry Jack's for a combined total of $1.50.