Where I live, there's this milkshake/halal food restaurant called 'Holy Shakes', which serves milkshakes like the ones at Black Tap. They have the Freakshakes (top), and the Signatures (bottom).

I ordered a signature Kit Kat Cinnamon Toast Crunch shake and it was GOOD! And the best part is that you can keep the bottle/jar and even return it to get 10% off your next shake next time you go there!

I have gotten sick from those shakes but they're STILL GOOD!