We get it, got to test the 'waters'.
Grab a sample pack - usually $24.99
Just $22.49
CASE FOR A CASE THROUGH BLACK FRIDAY · SUBSCRIBE & SAVE 20% · FREE SHIPPING ON ORDERS $50+ · MADE IN THE USA
Buy a case. We donate a case.
Energy for the ones who answer the call.
Zero sugar. 249mg of time-released caffeine from two sources keeps you steady from the first call to the last, from the drive in to the drive home. Informed Sport Certified. Made in the USA.
Choose your flavor:
Subscribe — $2.00/can
$23.99 billed monthly · 1 case donated · Cancel anytime
30-Day Money-Back Guarantee, keep the empties
Case for a Case
Buy a case, we donate a case. Every 12-pack you order through Black Friday, subscriptions included, sends a case of Underdog to Hearts 4 Heroes USA.
Collab tee · Underdog x Hearts 4 Heroes USA
Grit. Duty. Honor. Tee
$5 from every shirt goes to Hearts 4 Heroes USA.
$35
- ✓ 0g sugar · no artificial colors · no crash
- ✓ Informed Sport Certified, every batch tested
- ✓ Made in the USA · 5,000+ cans donated to first responders
INFORMED SPORT
Certified · every batch
0gSugar
249mgTime-released
USAMade here
1 for 1Case for a case
On the engine, Rescue Fire DepartmentWith Hearts 4 Heroes USA
Cans in the hands of the crews who run toward it.
Hearts 4 Heroes USA was started by firefighters and EMS to look after the people who show up on the worst day of someone else's life, and they help get service dogs to veterans who've served this country. Through them, we've put more than 5,000 cans of Underdog on engines, in ambulances and in station fridges.
From Veterans Day through Black Friday, every 12-pack you buy sends another case. Subscriptions count. Every case, every month.
5,000+Cans donated so far
1 for 1Cases donated through Black Friday
For those with something to prove
Built for the people who show up.
The firehouse
Firefighters, EMTs, police and dispatch. Steady through a 24 on, and you know exactly what's in the can.
The jobsite
Framers, electricians, plumbers, operators. First coffee to pickup time, without the 2 PM slump.
The base
Active duty, Guard and reserve. Early formations and long days. Informed Sport Certified, every batch screened for 250+ banned substances.
The hospital floor
Nurses, techs and docs working twelves. Clear-headed at hour ten, not jittery at hour two.
The long haul
Drivers, linemen and plow operators. One can that lasts instead of three that don't.
The night shift
Warehouses, plants and security. When the day starts at 10 PM, you need fuel that doesn't quit at midnight.
Read the label on any other can. Then read ours.
Every energy drink says "clean." Then you flip the can. Here's the contrast that matters most:
0gUnderdog sugar
vs
27gLeading energy drink
 Best choice |
300mg Spike Brand | Lifestyle Stim | Sugary Classic | |
|---|---|---|---|---|
| Sugar | 0g | 0g | 0g | 27g |
| Caffeine | 249mg · 2 sources | 300mg spike | 200mg spike | 114mg spike |
| Time-released caffeine | ✓ | ✗ | ✗ | ✗ |
| Real nootropics (Lion's Mane + Alpha-GPC) | ✓ | ✗ | ✗ | ✗ |
| Informed Sport Certified | ✓ | ✗ | ✗ | ✗ |
| Fully disclosed doses (no prop. blends) | ✓ | ✗ | ✗ | ✗ |
| Artificial colors, flavors & sweeteners | None | Yes | Yes | Yes |
| Every case sends a case to Hearts 4 Heroes USA | ✓ Through Black Friday | ✗ | ✗ | ✗ |
Comparison categories based on publicly available nutrition labels of leading competitor products. Brand names not used. Not affiliated with or endorsed by any referenced products.
Fully transparent. No proprietary blends.
Real ingredients at real doses, every one named on the can, with the exact amount.
175mg
Green Tea Caffeine
Fast-onset natural caffeine plus L-theanine for calm, jitter-free focus.
74mg
Di-Caffeine Malate
Slow-release caffeine that extends the curve instead of spiking and crashing.
★
Lion's Mane Extract
Clinical nootropic studied for memory, focus and cognitive support.
GeniusPure®
Alpha-GPC 99%
The highest-purity Alpha-GPC available, choline for sharper focus.
4g
L-Citrulline
Clinical-dose endurance amino acid for the back half of the day.
0g
Sugar
Naturally sweetened. No sugar, no artificial sweeteners, no crash.
0
Artificial Colors
No synthetic dyes, no artificial flavors, no preservatives. Ever.
✓
Banned-Substance Tested
Informed Sport Certified, screened for 250+ WADA-prohibited substances.
No proprietary blends. What's on the label is what's in the can.
Gas-station energy runs out before the shift does.
Most energy drinks spike you in 45 minutes, then drop you right when the day gets heavy. Two caffeine sources release at different speeds, so you get a flatter, longer curve from minute 20 to hour 5.
Underdog, smooth, 5-hour curve
Ordinary stim, spike & crash
5 reasons crews switch to Underdog.
If you're grabbing a can at the gas station on the drive in and another at break, here's what changes.
1
No more 2 p.m. crash
Two caffeine sources release at different speeds, so the back half of the shift feels like the front half.
2
Focus, not just a buzz
Lion's Mane + Alpha-GPC keep you sharp when the work needs your attention, not just your hands.
3
Cheaper than the counter
$2.00 a can on subscription, delivered to your door. Stock the cooler once a month and skip the stop on the way in.
4
You know what's in it
Zero sugar, no artificial colors, no proprietary blends. Informed Sport Certified, every batch.
5
Your case sends a case
Through Black Friday, every 12-pack you buy sends a case to Hearts 4 Heroes USA, backing first responders and service dogs for veterans.
Made in the USA. Built for the people who keep it running.
To everyone who has served, and everyone still on shift this Veterans Day: thank you. We're a small American company making clean energy for the crews, the shifts and the service members who keep this country moving.
Made in the USAEvery can, every batch
TestedInformed Sport Certified, screened for 250+ banned substances
5,000+ cansDonated to first responders through Hearts 4 Heroes USA
What customers are saying.
★★★★★
"No jitters, no caffeine crash, just all around great product… getting it done in the gym and at work."
Dustin F., customer review
★★★★★
"Excellent company to deal with - the owners are hands on. Shipping was prompt and I love the taste and amount of caffeine - kick starts my day and my workouts!"
Jackie S., customer review
★★★★★
"I grab an Underdog whenever I need a pick me up in the afternoon. It's everything they say, steady energy without the crash."
Lauren P., customer review
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Variety Pack reviews
Why we built it
My dad built his dream with his hands.
I grew up in a blue collar house in Mass. My dad put in 25 years in the union, then started his own wood flooring company.
Underdog is built for him, and for everyone still out there doing it. Case for a Case is our way of saying thank you to the people who answer the call.
Joey Stanizzi, Co-founder
Grab a cold one
300+ retail stores
Questions from the crew.
How does Case for a Case work?
From Veterans Day (Nov 11) through Black Friday (Nov 27), for every 12-pack you order on drinkunderdog.com, one-time or subscription, we donate a 12-pack to our nonprofit partner Hearts 4 Heroes USA. The 4-case Insider counts as four.
Who is Hearts 4 Heroes USA?
A 501(c)(3) nonprofit started by firefighters and EMS. They support first responders, with a focus on their mental health, and help get service dogs to veterans. We've donated more than 5,000 cans through them so far.
How much caffeine is in a can?
249mg total, time-released from two sources: 175mg green tea caffeine and 74mg di-caffeine malate. That gives you an extended curve instead of a single 30-minute spike.
Is it really banned-substance tested?
Yes. Every batch is Informed Sport Certified, screened for 250+ substances on the WADA prohibited list.
Can I cancel my subscription?
Anytime. Skip a delivery, change your flavors, or cancel from your account, no phone call, no catch.
What if I don't like it?
30-day money-back guarantee.
When does it ship?
Orders ship in 1-2 business days from the US. Free shipping on orders $50+.
Fuel for the ones who answer the call.
Buy a case, we donate a case, now through Black Friday. Clean, time-released energy. Made in the USA. 30-day money-back guarantee.
Subscribe & Save $23.99 Or one-time $29.99 · Every case sends a caseUnderdog Variety Pack
$2.00/can subscribed · 1 case donated