A prefilled pod kit is a rechargeable vaping device that uses replaceable pods already filled with e-liquid by the manufacturer, rather than a bottle you fill yourself. Since the UK banned the sale and supply of single-use vapes from 1 June 2025, prefilled pod kits have become one of the main replacements for anyone who liked the simplicity of a disposable but now needs a reusable device.
This guide covers how prefilled pod kits work, how they differ from disposables and refillable pod systems, what the UK's compliance limits actually mean for how these kits are built, and how two current ranges, the Hayati 25K and the Crystal Pro Switch 30K, fit into that picture.
What is a prefilled pod kit, exactly?
A prefilled pod kit has two parts: a rechargeable battery unit, and a sealed pod containing e-liquid and a coil, already assembled by the manufacturer. You click the pod into the device and inhale to vape. When the pod runs dry, you replace the whole pod rather than topping it up, and you keep the battery unit. This is also called a closed pod system, since the pod itself can't be opened or refilled once sealed.
That's the core distinction from a refillable, or open, pod system, where you fill an empty pod yourself from a bottle of e-liquid and replace just the coil when flavour drops off.
Setting up and using a prefilled pod kit
- Charge the device fully via its USB-C port before first use, typically 45 to 60 minutes from empty.
- Insert the pod until it clicks or seats securely, the exact method varies slightly by brand.
- Draw on the mouthpiece to activate, most prefilled kits are draw-activated with no buttons.
- Replace the pod once flavour fades or vapour output drops, rather than attempting to refill it.
Pods are specific to their own device range, a Hayati Pro Ultra Plus pod won't fit a Crystal Pro Switch device or vice versa, so any replacement pod needs to match the kit you're using.
Prefilled pod kits versus disposable vapes
The two feel similar to use, draw-activated, no buttons, familiar flavour profiles, but the mechanics differ in one important way: a disposable vape is a single, sealed unit with a non-rechargeable battery, discarded whole once either the liquid or the battery runs out.
A prefilled pod kit separates those two components. The battery is rechargeable and stays with you, only the pod (holding the e-liquid and coil) gets replaced. That single change is what let prefilled pod kits become the disposable ban's most direct replacement category, since it keeps the click-in simplicity while removing the single-use battery that the ban specifically targeted.
Prefilled pod kits versus refillable pod kits
Both are reusable and rechargeable. The difference is upkeep. A refillable pod kit needs you to fill the pod from a bottle and replace the coil separately when it wears out, more control over flavour and strength, more steps involved.
A prefilled pod kit removes both of those steps in exchange for less flexibility, you're choosing from whatever flavours and strengths the manufacturer has already put into that pod range. For someone who found refilling and coil changes tedious as a disposable switcher, prefilled is the lower-maintenance option of the two.
How UK compliance shapes these kits
Prefilled pod kits sold in the UK are built to the Tobacco Products Directive (TPD), implemented through the Tobacco and Related Products Regulations 2016 (TRPR).
Two limits from that regulation directly shape how these devices are designed: nicotine containing e-liquid cannot exceed 20mg/ml, and a single sealed tank or pod cannot hold more than 2ml of nicotine containing liquid at once (gov.uk/guidance/e-cigarettes-regulations-for-consumer-products).
That second limit is why kits like the Hayati 25K and Crystal Pro Switch 30K are built around a small 2ml active pod paired with separate 10ml refill containers, rather than one larger tank. The 2ml limit applies to what's sealed inside the pod itself, while the 10ml limit is the separate cap on a standalone refill container, so pairing a compliant 2ml pod with a compliant 10ml auto-refill container is how these kits reach a higher total puff count without breaching either limit individually.
From 1 October 2026, the UK's Vaping Products Duty also applies at a flat rate of £2.20 per 10ml of vaping liquid, regardless of nicotine strength (gov.uk/guidance/handling-wholesale-or-retail-vaping-products-in-the-uk). Since prefilled pod kits are sold with their e-liquid already inside rather than as a separate bottle, that duty is priced into the kit or refill pack itself once the duty is in force, rather than charged as a separate line item at checkout.
Two current examples: Hayati 25K and Crystal Pro Switch 30K
The Hayati 25K, more fully the Hayati Pro Ultra Plus 25000, pairs an 850mAh rechargeable battery with a 2ml prefilled pod and two 10ml auto-refilling tanks, built around a dual mesh coil for the mouth to lung draw disposable switchers are typically used to.
It measures approximately 107mm x 53mm x 29mm, weighs around 113g, and reaches a full charge from empty in roughly 45 to 60 minutes via USB-C. It's rated for up to 25,000 puffs across a full refill pack and uses 20mg/ml nicotine salt e-liquid across a flavour range that runs to several dozen options. You can browse the current Hayati vapes collection for the full pod and flavour range.
The Crystal Pro Switch 30K follows a similar structure, an 850mAh battery, 0.8ohm dual mesh coil, and a 2ml pod paired with a 10ml refill container for roughly 22ml total capacity, but adds a dual-flavour switch built into the mouthpiece, letting you toggle between two loaded flavours in the same device without swapping pods. It also charges via USB-C in around 45 to 60 minutes, is rated for up to 30,000 puffs across a full pack, runs 20mg/ml nic salt, and is TPD compliant under the same limits as above. It sits in the Crystal vapes collection alongside the rest of that range.
Both are examples of the same underlying prefilled pod kit format described above, a rechargeable battery plus a sealed, manufacturer-filled pod, just with different battery capacity, puff rating and flavour-switching features. If you're comparing prefilled pod kits generally rather than these two specifically, the full prefilled pod kit collection covers the wider range of brands and puff counts available.
Cost and environmental comparison with disposables
A single disposable vape typically held around 2ml of e-liquid and cost roughly £3-6 before the ban. A prefilled pod kit costs more upfront, typically £8-20 for the device itself, but replacement pods cost less per ml than a full disposable did, so the running cost evens out and then drops below a disposable's over repeated use.
On the environmental side, the difference comes down to the battery: a disposable's battery is discarded with the whole device after a single use, while a prefilled pod kit's battery is rechargeable and reused across many pod replacements, which is the main reason prefilled kits are generally considered a lower-waste alternative to disposables, not because the pods themselves are reusable, they aren't.
Common Issues
Weak or burnt flavour: usually means the pod is empty or near the end of its life. Replace it rather than continuing to use it.
No vapour when drawing: check the pod is fully seated and the device has charge.
Leaking: often caused by a pod that wasn't clicked in fully, or storing the device on its side rather than upright.
Battery won't hold charge: confirm the USB-C cable and port are making a full connection. If the issue persists, the battery itself may be faulty.
FAQs
What is a prefilled pod kit?
A rechargeable vaping device that uses sealed, manufacturer-filled pods instead of a bottle you fill yourself. You replace the pod when it's empty and keep the battery unit.
Is a prefilled pod kit the same as a disposable vape?
No. A disposable is a single sealed unit discarded whole once it's empty. A prefilled pod kit keeps a rechargeable battery permanently and only replaces the pod.
Can I refill a prefilled pod myself?
No. Prefilled pods are sealed at the point of manufacture specifically so they can't be topped up. If you want to refill your own e-liquid, a refillable (open) pod kit is the format built for that.
Are prefilled pod kits legal in the UK?
Yes, provided they meet TPD/TRPR limits, no more than 20mg/ml nicotine and no more than 2ml in a single sealed pod. Both the Hayati 25K and Crystal Pro Switch 30K are built to these limits.
How long does a single pod last?
A standard 2ml pod typically lasts 500-600 puffs, roughly one to three days depending on how often you vape. Auto-refill tanks extend that considerably before the full pack needs replacing.
Is the Hayati 25K or Crystal Pro Switch 30K better for someone switching from disposables?
Both use the same battery capacity, coil type and nicotine strength, so the practical difference is the dual-flavour switch on the Crystal Pro Switch 30K versus the single-flavour-per-pod setup on the Hayati 25K. Neither requires more experience than the other to use.
