RUBI Energy
RUBI Energy
RUBI Energy
RUBI Energy
RUBI Energy
Rated 4.9/5 by 200,000+ UK Customers

YOUR NEXT ENERGY DRINK DOESN'T COME IN A CAN.

Meet RUBI. Refreshing, fruity energy in a sachet. Just add still or sparkling water and discover your new favourite.

  • 80mg Caffeine · 0 Sugar + L-theanine & Vitamin B6 + B12
  • 97.2% Rated 5 stars for Taste
  • No Subscription · First-Taste Guarantee
30-Day Guarantee
Fast UK Shipping
Secure Checkout
Rebecca J.

“I keep a sachet in my bag for busy afternoons. Just add cold water and it’s ready in seconds — so much easier than carrying an energy drink can around.”

Rebecca J. Verified
Sarah M.

“Peach & Mango with sparkling water is such a refreshing combination. It tastes fruity, not overly sweet, and making it feels like a little treat in my day.”

Sarah M. Verified
Emma P.

“I love having four flavours to choose from instead of buying the same can every time. The sachets barely take up any space, and the bundle is great value.”

Emma P. Verified
4.9 Rated
Real Reviews

LOVED BY 200,000+ CUSTOMERS.

See what people are saying about swapping cans for RUBI.

★★★★★
"Swapped my daily Red Bull for this."

Tastes so much better and I don't get the 3 PM crash anymore. Crisp Apple is incredibly refreshing. Being able to just throw a sachet in my gym bag is perfect.

James T. Verified Buyer
★★★★★
"Incredible value for money."

I was spending £3 a day on energy drinks from the corner shop. Now I just keep a few sachets in my desk drawer at work. Mixes perfectly even in just cold water.

Sophie R. Verified Buyer
★★★★★
"The L-theanine really works."

I feel sharp and focused rather than just buzzed or jittery like normal pre-workouts make me feel. Strawberry Watermelon is dangerously good.

Tom B. Verified Buyer
★★★★★
"Perfect for long drives."

I travel for work and cans get warm and gross in the car. I just buy a cold water bottle at the services and mix this in. Game changing for my road trips.

Liam C. Verified Buyer
★★★★★
"Game changer for work bags"

I used to carry bulky energy drink cans everywhere. Dropping a few sachets in my bag has changed everything. Tastes amazing, zero sugar, zero guilt.

Marcus L. Verified Buyer
★★★★★
"Saved me so much money."

I bought the bundle and it works out to just over a pound a drink. The Blueberry is absolutely spot on. No weird aftertaste either which is rare for zero sugar.

Chloe M. Verified Buyer
★★★★★
"No jitters, clean focus"

The addition of L-theanine makes a massive difference compared to standard energy drinks. Smooth clean energy all afternoon without the crash at the end of the day.

David K. Verified Buyer
★★★★★
"So easy to make"

Tear, pour into cold water, shake, done. Takes 10 seconds. Perfect for my morning commute. Strawberry Watermelon has become my absolute favorite morning ritual.

Emma W. Verified Buyer
★★★★★
"No more bulky cans."

My recycling bin used to be absolutely full of empty energy drink cans every week. Now I just use my reusable bottle and RUBI. Tastes better and much better for the planet.

Oliver H. Verified Buyer
★★★★★
"Peach & Mango is incredible"

Was skeptical about powder energy drinks tasting chalky, but this is completely smooth and refreshing. Getting 28 sachets for £21.99 with Buy 2 Get 2 Free made it an absolute no-brainer to try.

Sarah H. Verified Buyer

TEAR. POUR. SHAKE.

ENERGY. MADE SIMPLE.

80MG

CAFFEINE

80mg in every sachet.

L-THEANINE

Included in the RUBI formula.

ZERO

SUGAR

Zero sugar in every sachet.

B6 + B12

VITAMINS

Included in every sachet.

RUBI IN REAL LIFE

RUBI

The Taste

RUBI

The Convenience

RUBI

Just got my Buy 2 Get 2 Free order.

YOUR ENERGY DRINK. WITHOUT THE BULK.

  • Keep it in your pocket or bag
  • Just add cold water
  • Energy on hand wherever you are
28 Energy Drinks. £21.99 Delivered.
Just £0.79 per drink.

YOUR DAY ISN'T DONE YET.

For the afternoon slump, the long drive, the busy day and whatever's next.

Which one are you opening first?

Peach & Mango
Strawberry & Watermelon
Blueberry
Crisp Apple

STILL OR SPARKLING.

Drink it however you like.

STILL
SPARKLING

FREQUENTLY ASKED QUESTIONS

What if I don't like RUBI?

Your first qualifying RUBI order is covered by our 30-Day First-Taste Guarantee. You can taste up to 3 sachets. If one flavour isn't for you, contact us about a one-time flavour replacement. If RUBI genuinely isn't for you, contact us within 30 days of delivery and return the remaining product for a qualifying refund. Terms apply.

Is this a subscription?

No. This offer is a one-time purchase with no subscription or recurring charges.

How does Buy 2 Get 2 Free work?

Choose any 4 × 7-sachet packs in the bundle builder. You get 28 sachets plus a free reusable bottle for £21.99 — about 79p per sachet. Your B2G2 offer and bottle discount are applied at checkout, so there is no code to type.

What is included in the Ultimate Bundle?

The Ultimate Bundle includes 8 × 7-sachet packs — 56 sachets — plus a free Reusable Bottle for £39.99. Choose your flavour mix, then the Ultimate offer is applied automatically at checkout.

How does shipping work?

The 8-sachet Taster Sample Pack is £7.60 plus shipping, calculated at checkout. Buy 2 Get 2 Free and Ultimate include free standard delivery.

Can I choose my own flavours?

The Taster Sample Pack is fixed at 2 single sachets of each of the four flavours. With Buy 2 Get 2 Free and Ultimate, you can choose your own flavour mix and repeat favourites.

How much caffeine is in each RUBI?

Every sachet contains exactly 80mg of caffeine.

How do I prepare RUBI?

Tear the sachet, pour it into cold water, and shake well.

Does RUBI contain sugar?

No, all RUBI flavours are completely zero sugar.

Stay in the RUBI loop

More RUBI
is coming.

New flavours. New drops. More energy for real life.

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