Engineered, not decorated.
The details you don't see are the ones that matter — the cold chain, the materials, the way a pen sits in the hand. Here's the thinking behind the hardware.
Keeping temperature-sensitive vials cool
Many vials are temperature-sensitive and are happiest kept cool. The problem is the day you leave the house — a commute, a warm office, a weekend away — where a fridge isn't an option. The Cooling Bag is built for exactly that gap.
It uses a foil-lined, insulated wall to slow the transfer of heat from the outside world to what's inside. The tighter the insulation and the fewer the openings, the longer the interior holds its temperature. Internal loops and a mesh pocket keep everything still, so nothing knocks around in transit. We publish the exact cold-retention figure once it's independently confirmed — measured, not estimated.
Insulated wall
A foil-lined, cushioned shell that slows heat transfer and shields contents from knocks.
Everything in its place
Elastic loops and a clear pocket hold items still, upright and organised on the move.
Measured, not guessed
Cold-retention performance is printed only once it's independently verified.
A pen made to be kept
A reusable device earns its keep by being simple, consistent and pleasant to use — every single day. We obsess over the weight and balance, the tactility of the matte finish, and a clear, legible dose window. Precision engineering isn't about complexity; it's about the same, reliable action each time, with nothing extra to go wrong.
Materials that last
We choose medical-grade, durable materials that are easy to clean and built to be kept rather than replaced. Full material and care specifications are printed with each piece — no vague marketing, just what it's made of and how to look after it.
Where the clinical part sits
Elixir engineers hardware. We do not prescribe, supply or sell medicine, and we make no medical or health claims. Where a routine involves a prescription-only medicine such as NAD+, the assessment, prescribing and supply are handled entirely by independent, licensed UK clinics and regulated pharmacies — after a consultation, and only when a clinician decides it's appropriate.
If you'd like to understand that supported route, the NAD+ programme page walks through it step by step, starting with a short eligibility check reviewed by a licensed UK prescriber.
Engineered for real use.
A pen that feels the same in the hand every day, a case that protects it, and a cooling bag that holds its temperature between one cool place and the next. Precision where it matters.
Built to keep up.
Insulated, organised and discreet — the kit keeps pace with wherever the day takes you.
Feel the difference in the hand.
The Pen, the Case and the Cooling Bag — engineered to be kept.