A former Starbucks manager revealed on Reddit which Starbucks drink will give you the biggest bang for your buck on caffeine.
It’s the Starbucks Doubleshot on Ice, an iced-coffee drink that has 225 milligrams of caffeine, which is equivalent to 2 1/2 cups of normal coffee.
The price may vary depending on the Starbucks location, but you should get more caffeine for your money than any of the other drinks.
Just make sure you order from a barista, and not get any of those cans you see see in convenience stores. Also make sure to get it iced NOT hot!
There’s a hot version called the Doubleshot that only has 110 milligrams of caffeine.