Black Friday on everything

10% off by post with code BF10, already added for you, and 10% off at our clinic when you pay. Dentures are not included.

15% off this weekend, by post and at our clinic, taken off for you. Dentures are not included.

10% off15% offBy post and at our clinic

Teeth whitening trays made to fit your teeth

Thin clear trays made from the shape of your teeth, so whitening gel stays on your teeth and off your gums.

A hand holding a custom whitening trayOur custom whitening trays

Custom whitening trays, made in our UK lab. Same day at our clinic from £149, or by post from £69.95.

  • Rated Excellent on Trustpilot
  • Made in our UK lab
  • GDC registered technicians

Custom whitening trays vs one size trays

Shop trays come in a few sizes or you bite into softened plastic. Ours are made in a lab from a model of your teeth.

Custom whitening trays
One size trays
Made from your teeth
Close fit
Partly
Keeps gel off gums
Partly
Thin and comfortable
Kept for top ups
Putting whitening gel into a trayOur custom whitening trays

Why the fit of whitening trays matters

Gel works on the tooth surface. A close tray keeps it pressed evenly on each tooth. A loose one lets it slide off and pool on your gums.

The NHS lists sore gums, white patches on the gums and teeth sensitive to cold or sweet as side effects of whitening. A good fit keeps more gel off your gums, and you use less each time.

The Oral Health Foundation describes home whitening as thin trays that fit your teeth exactly. Ours are 1.5mm semi rigid: firm enough to hold shape, thin enough to wear comfortably.

Clear whitening traysOur custom whitening trays

Teeth whitening gel for trays: UK rules

UK law treats whitening as dentistry. The General Dental Council (GDC) says only registered dental professionals can provide it: dentists, or hygienists, therapists and clinical dental technicians working to a dentist's prescription.

Gels with 0.1% to 6% hydrogen peroxide can only be sold to dental professionals. The first use of each course must be by one, or under their direct supervision, and not on anyone under 18. Over 6% is illegal for cosmetic use. Under 0.1%, like toothpaste, is freely sold.

So a peroxide gel has to come through a dentist. Our whitening kit uses PAP+, a peroxide free gel.

Be wary of strong gels online

Very strong gels, or gels sold with no dental check, may break UK law. The NHS says online and salon kits work less well and may harm teeth and gums.

How to use whitening trays

  1. 1Start with clean teeth

    Brush and floss so gel reaches the tooth. Dry the trays.

  2. 2Add a little gel

    A small dot at the front of each tooth space. Too much squeezes onto your gums.

  3. 3Press into place

    Seat the trays gently. Wipe any gel off your gums with a tissue.

  4. 4Time it, then rinse

    Wear only as long as your gel says. Then rinse, clean the trays and store them in the case.

How to clean and look after your trays

  • 1Rinse in cool water after each use
  • 2Brush gently with a soft brush, no toothpaste
  • 3Never use hot water: it can warp them
  • 4Dry fully, then keep in the case
  • 5Sore teeth or gums? Stop and let them settle
  • 6Still sore? See a dentist

How long do whitening trays last?

Usually 6 to 18 months, depending on use and care. Many people whiten for a course, then keep the trays for the odd top up.

Replace them if they split, turn cloudy and rough, or stop sitting snugly. New dental work or teeth that have moved can also stop old trays fitting.

What whitening trays can't do

We are a dental lab, not a dentist. Sensitive, painful, or not sure your teeth are healthy? See a dentist before whitening.

  • Whiten crowns, veneers, fillings or bonding
  • Lighten a tooth gone grey or dark from inside
  • Fix decay or gum disease: see a dentist first
  • Be used by anyone under 18

Get your trays same day or by post

The same trays either way, made in our lab.

Same day at our clinic

£149 one arch, £199 both

Around 2 hours

You want trays today and can visit Motherwell, near Glasgow

Things to know

Booking needs a £25 deposit, which comes off the total

Same day whitening trays

By post

£69.95 to £99.95

1 day once we have impressions

Ordering from anywhere in the UK, or you have scans or models

Things to know

You take impressions at home with our kit. 14 day fit guarantee.

Trays by post

Questions people ask

Something else? Send us a message.

Can I use gel from my dentist in your trays?

Ask your dentist. Peroxide gels must come from a dental professional, and GDC rules mean they may want to check the trays or supervise the first use.

What gel goes in whitening trays?

A peroxide gel prescribed by a dentist, or a peroxide free gel such as PAP+. Our whitening kit includes custom trays and 3 syringes of PAP+.

How many shades whiter will my teeth go?

We don't promise a number. It depends on your starting colour, the gel and how you use it. Whitening only changes natural teeth, not dental work.

How long do whitening results last?

It varies and fades over time. Tea, coffee, red wine and smoking bring stain back sooner. Keeping your trays lets you top up.

Do I need trays for top and bottom teeth?

Only to whiten both. Many people whiten just the teeth that show when they smile. Order one arch or both.

Can I sleep in whitening trays?

Only if your gel's instructions say so. Always follow the wear time on your gel.

Are whitening trays the same as a retainer?

No. They look alike, but trays hold gel on your teeth and a retainer holds teeth in place. Don't swap one for the other.

A brighter smile, made to fit.

Whitening trays, made in our UK lab. Same day at our clinic near Glasgow, or by post to your door.

About this guide

Written by the team at our UK dental lab, where GDC registered technicians make every appliance. We are a dental lab, not a dentist: we make cosmetic and protective appliances and cannot diagnose or treat dental problems. If you are unsure, see a dentist first.

Written by the Venneir lab team. Updated 12 Nov 2026.

Sources