Canned pre-workout and ready-to-drink energy drinks are everywhere for a reason. They're cold, they're sitting in the cooler next to the register, and there's nothing to measure or mix. You crack it on the drive to the gym and you're done thinking about it. We get it, and plenty of people who train hard every week run on exactly that routine.

The convenience is real. What gets lost is what's inside the can, how much control you have over it, and what the habit costs over a year of training. Those three things are worth a couple of minutes, because once you know how to read them you can check any can or tub on the shelf, including the one in your hand right now.

Flip a can around and look at the panel. Most energy drinks are built around caffeine, with B vitamins, sugar or sweeteners, and sometimes taurine filling out the label. Canned pre-workouts usually add a few performance ingredients on top of that. The thing to look for is whether each ingredient has a gram amount printed next to it, or whether it's tucked inside a blend with one total weight. A blend tells you what's in there. It doesn't tell you how much.

The ingredients that drive pump and endurance tend to need real space. L-citrulline works at multiple grams per serving, and beta-alanine research has been built around daily intakes of several grams, according to the International Society of Sports Nutrition position stand on beta-alanine. When you're reading a can, look for those grams and check them against what a full-dose tub carries.

This is the part people overlook. Once a can is open, the dose is decided for you. If it's more caffeine than you wanted at 6pm, the choice is drink all of it or pour some of it out. A scoop works the other way around: you decide how much goes in the shaker based on the time of day, how you slept, and what kind of session you're walking into.

If you're coming over from cans, start with half a scoop and find out where you are. The first time, most people want to know what the first 30 minutes feel like more than they care about the formula. Expect the energy to come on within about 10 to 20 minutes, and expect a light tingle from beta-alanine, which is normal and fades as you train. Once you know how your body responds, move up to the full scoop.

A single energy drink or canned pre-workout commonly runs around $3 at a gas station or convenience store, and it's easy to stop counting because it's only a few bucks at a time. A tub turns that into one number you can actually look at. GET FKD is $59.99 for 30 full servings, one scoop each, which comes out to $2.00 a session. GET PMPD is $59.99 for 25 servings, or $2.40 a session.

Two tubs at once brings it down further. The Bundles & Stacks run $110 for two tubs, so here's how that lands per session:

Five sessions a week is 260 sessions a year. At around $3 a can that's roughly $780, and at $2.00 a scoop it's $520. The scoop is also the full dose printed on the label, every time, so you're paying less per session for more grams of the ingredients that do the work in the gym.

Here's the situation a lot of people are in: you had an energy drink at lunch to get through the workday, and now it's 5pm and you're headed to the gym. Another can, or a full high-stim scoop, stacks a lot of caffeine on top of what's already in your system, and it's still going to be there when you try to sleep. A controlled sleep study found that 400mg of caffeine taken even six hours before bed cut total sleep time by more than an hour.

GET PMPD was built for exactly this. It carries 85mg of caffeine, about what you'd get from a cup of coffee, alongside 7g pure L-citrulline, 3g GlycerPump, 3.2g beta-alanine, and the same focus foundation as GET FKD. The pump was never coming from the caffeine. Citrulline, glycerol, and beta-alanine do that work, so you can train hard later in the day without doubling down on stimulants.

The FDA cites 400mg a day as an amount not generally associated with negative effects for healthy adults. Run the numbers on a typical afternoon:

Part of why cans stick is that people like how they taste, and nobody wants a $60 tub they have to choke down. Both formulas come in Blackberry Lime (Electric Blackberry Lime in GET PMPD), Cherry Taffy, Grape Slushie, and Pink Lemonade. Mix it cold in a shaker and you've got the same grab-and-go routine as a can for less per session. Read what people are saying about the flavors on our reviews page before you pick one.