Pre-Workout

Ready-to-drink pre-workout in NZ: bottles and cans

Ready-to-drink pre-workout in NZ: PER4M RTD bottles and pre-workout-style energy cans compared on caffeine, extras and cost per serve.

By NZ Supps Team Updated 23 September 2026 5 min read
Nexus PER4M RTD bottle and a C4 Carbonated can in a car cup holder next to a gym bag

Not everyone wants to scoop powder into a shaker at 5:30am. A ready-to-drink pre-workout fixes that: grab it from the fridge, drink it in the car, walk in ready. The honest catch is that plenty of cans calling themselves "pre-workout" are really just energy drinks. Here is what we stock, and which ones actually earn the name.

The short answer

  • Best all-round RTD pre: Nexus PER4M RTD. 500ml, still (not fizzy), 160mg caffeine, with citrulline malate and beta-alanine.
  • Best fizzy option: C4 Carbonated Cotton Candy. Real pre actives in a zero-sugar can.
  • Best lighter energy hit: Bucked Up Energy Miami. More energy drink than full pre, with training-friendly extras.
  • Drinking one most days? Buy a 12-pack. It is noticeably cheaper per drink.

RTD pre vs energy drink: what makes it a pre

Caffeine alone does not make a pre-workout. Almost every energy drink has caffeine. What separates a proper pre-workout is the training actives:

  • Citrulline supports blood flow and pump.
  • Beta-alanine supports muscular endurance in hard sets. It is also the ingredient behind the harmless tingle some people feel.
  • Focus ingredients like tyrosine and L-theanine, which smooth out the caffeine.

If a can lists caffeine, taurine and B vitamins and stops there, it is an energy drink. That is not a bad thing, it just does a different job. We go deeper on this in energy drink vs pre-workout.

The options we stock

Nexus PER4M RTD

This is the one we would point most people to first. It takes the PER4M pre-workout formula and puts it in a 500ml bottle. It is non-carbonated, which matters more than you would think. A big fizzy drink right before squats is not everyone's idea of a good time.

Each bottle has 160mg of caffeine plus theobromine for steadier energy, L-citrulline malate and beta-alanine for the training side, and a tyrosine and L-theanine blend for focus. It is zero sugar. That is a proper pre-workout, just without the scoop.

C4 Carbonated

C4 Carbonated is the ready-to-drink version of C4, one of the best-known pre-workouts around. It comes in a fizzy, zero-sugar 473ml can and carries CarnoSyn beta-alanine, L-citrulline and N-acetyl-L-tyrosine, so it goes well beyond a standard energy drink.

It suits you if you like a carbonated drink and want real pre actives. Check the can for the exact caffeine figure before your first one, especially if you are sensitive. If you are choosing between C4 cans on taste, our C4 Energy flavours ranked post covers the brand's canned energy range.

Bucked Up Energy

Bucked Up Energy is a zero-sugar, fully carbonated 355ml can. Beyond the caffeine it brings taurine, L-arginine for blood flow, green tea extract and a B-vitamin blend.

We would call it a lighter alternative to a full pre-workout rather than a pre itself, since the extras it highlights are taurine and L-arginine rather than the citrulline and beta-alanine core of a full pre. It is a strong pick for an afternoon lift, a long workday, or when you want energy without the full pre experience. Check the caffeine figure on the can, and treat one as your caffeine for the session.

Side by side

Drink Format Pre actives Best for
PER4M RTD 500ml still bottle Citrulline, beta-alanine, focus blend Most lifters, pre-gym drive
C4 Carbonated 473ml fizzy can Beta-alanine, citrulline, tyrosine Fizzy drink fans
Bucked Up Energy 355ml fizzy can L-arginine, taurine Lighter energy, workdays

PER4M RTD has 160mg of caffeine per bottle. For C4 Carbonated and Bucked Up, read the caffeine figure on the can, and never double up with another caffeine source before training.

Case packs save money

If you drink one on most training days, singles add up fast. At time of writing:

A 12-pack of PER4M RTD or C4 also lands right on our $70 free shipping threshold. For a deeper look at the maths, see our guide to case packs and price per can.

The honest trade-off: powder is still cheaper per serve than any RTD. If you train at home or do not mind a shaker, pre-workout powders give you more serves for the money and let you adjust the dose. RTDs are for convenience, and that convenience is worth paying for on busy mornings.

Where NZ Supps fits

We stock the full range of canned energy and RTD drinks, and you can browse all ready-to-drink products, including protein shakes, in one place. Most of these come as singles and 12-packs, so you can try one flavour before committing to a case.

Once you have found your favourite, the case is where the savings kick in.

FAQ

Is a ready-to-drink pre-workout as good as powder? A good one gets close. Nexus PER4M RTD and C4 Carbonated both carry real pre-workout actives like citrulline and beta-alanine, not just caffeine. Powder still wins on cost per serve and lets you adjust the dose, but a bottle or can is hard to beat for convenience.

How much caffeine is in Nexus PER4M RTD? Each 500ml bottle of PER4M RTD has 160mg of caffeine plus theobromine. That puts it in a moderate range that suits most regular pre-workout users.

What is the difference between a pre-workout drink and an energy drink? Energy drinks are mostly caffeine, flavour and vitamins. A ready-to-drink pre-workout adds training actives such as citrulline for blood flow and beta-alanine for muscular endurance. Bucked Up Energy sits in between, with extras like L-arginine and taurine.

Are pre-workout drinks carbonated? It depends. PER4M RTD is still, which many people find easier to drink before training. C4 Carbonated and Bucked Up Energy are fizzy cans.

Is it cheaper to buy pre-workout drinks by the case? Yes. At time of writing, a 12-pack of PER4M RTD or C4 Carbonated works out to about $5.83 per drink versus $6.79 for a single. If you drink one most training days, the case is the smarter buy.

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