Whether you prefer a bold, robust brew or a smooth, mellow blend, 7-Eleven® has the fresh coffee that suits your taste.

Compared with Starbucks, McDonald's, and Dunkin' Donuts, independent testing company Labdoor found an average of 280 milligrams of caffeine in 7-Eleven coffee, while the other brands' average levels were significantly lower.

From Tuesday 4 October 7-Eleven's coffee offer will change in price for the first time since 2009 with a regular cup to cost $2. The price change has been driven by sustained cost increases particularly over the past 12 months, which have made existing prices unsustainable.

Compared with Starbucks, McDonald's, and Dunkin' Donuts, independent testing company Labdoor found an average of 280 milligrams of caffeine in 7-Eleven coffee, while the other brands' average levels were significantly lower.

Based on concentration levels of caffeine, these would be the strongest coffee types:

• RISTRETTO.
• ESPRESSO.
• LUNGO.
• FLAT WHITE.
• CAPPUCCINO.
• LATTE.
• LATTE MACCHIATO.

The savings you crave on the favorites you crave, exclusively with 7REWARDS. The best coffee, the poetry of a freshly ground espresso, or the ice-cold enjoyment of cool Big Gulp is better when it costs less. That's why 7-Eleven has $1 any size coffee* and 49¢ Big Gulp**, only with 7REWARDS.

From October 4, the price of a regular coffee will double, going from $1 to $2. "To keep pouring you the same quality cupful that we all know and love, we will have to increase the price in October," 7-Eleven has said in a statement, which has been shared on its Facebook page.

According to the FDA, the half-life of caffeine - the time it takes for the starting amount of the substance to reduce by half - is between four and six hours. This means that up to six hours after drinking a caffeinated beverage, half of the caffeine you consumed is still present in your body - keeping you alert.

Cold brew contains the most amount of caffeine due to the longer brewing time. Then comes drip, and then espresso. Albeit, most people in Canada drink a double shot of espresso in their drinks so these can contain more caffeine than a drip coffee.

Black Label Brewed Coffee is believed to have the most caffeine per ounce at 129.6 mg. And when it comes to brand name caffeine, Coffee Bean & Tea Leaf's regular coffee packs the most caffeine per ounce at 20.8 mg. That's more than twice the amount of caffeine offered in McDonald's coffee (9.1 mg per fluid ounce).

From Tuesday 4 October 7-Eleven's coffee offer will change in price for the first time since 2009 with a regular cup to cost $2. The price change has been driven by sustained cost increases particularly over the past 12 months, which have made existing prices unsustainable.

There are a few ground rules: The cup or other container has to be “food-safe and clean,” so thoroughly wash your wacky item of choice; must fit upright within a 10-inch aperture displayed in the store, which means you will be able to fit it under the Slurpee dispenser; and be watertight.