You don't have to fork out the cash or subject yourself to sensitivity to brighten your smile - try these natural teeth-whitening tips instead...
Know the white-shirt rule
Memorize this mantra: Anything that stains a white shirt will stain your teeth. The answer? Use a straw when you drink anything with color, such as soda, juice or smoothies. If you're having red wine or coffee - or foods that feature curry powder, soy sauce, dark berries or beetroot - have a glass of water alongside it. By swilling the water around your mouth, you'll prevent the color from staining.
Don't forget to floss
Brushing only cleans 70% of your teeth's surface, so flossing with an interdental brush, floss or tape to remove the yellow plaque that dulls your smile is a no-brainer. Try Oral B Super Floss (link to a specific product page), which cleans even the hardest-to-reach-places.
Rock a red lip
Red lipstick is not only fabulous for holiday season, it instantly amps up your grin. Contrary to popular belief, it's not the red itself that makes your teeth appear whiter, but the blue undertones it contains, which minimize yellow tinges.
After eating, have a square of cheese. It's brilliant at neutralizing the acid in your mouth and keeping your enamel healthy - and the less damage to your enamel, the less discolorations! As an added bonus, cheese is high in calcium, which is vital for strong teeth and bones.
Watch the bubbles
For white teeth, choose still drinks rather than sparkling - the bubbles in fizzy drinks can erode enamel and harm teeth. If you don't want to give up the fizz, don't forget the straw!
Get snack smart
Next time you fancy something sweet, reach for strawberries. They contain malic acid, an enzyme that encourages saliva production, so you naturally rinse your teeth clean as you eat. Not a strawberry lover? The abrasive texture of nuts and seeds also works to remove surface stains, kind of like a natural exfoliator for your teeth.
Power up your tools
Don't underestimate how important the basics are. For maximum whiteness, choose an electric brush over a manual - it's the equivalent of cleaning the floor with a hoover rather than a dustpan and brush. Oral-B Vitality Toothbrush shifts up to 100% more plaque than a regular manual toothbrush.
Rein in the rinsing
After brushing your teeth with toothpaste, don't swill your mouth with water straight away or you'll instantly wash away the teeth-protecting fluoride and any whitening ingredients.
Stop the cigs
You've heard it before (and you'll hear it again) but smoking is bad news for your teeth. The nicotine and tar stain your teeth yellow very quickly and years of smoking can even turn them brown. Yet another reason to give them up for good.
A tan is guaranteed to make your teeth look whiter, so treat yourself to a new bronzer. It'll make you feel great, too. What's not to love?
There's nothing more beautiful than a big happy smile, so in the run up to the busy holiday season, do things that reduce your stress and boost your confidence, whether that's playing silly games with the children or meeting up with the girls.
What's your top teeth whitening tip? Share your tricks below - and for more smart advice on achieving a happy healthy smile, check out Oral-B.
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