Celebrity chef Nigella Lawson said she is a "complete nightmare" to make a cup of tea for.
Nigella Lawson has admitted she travels with her own kettle and mug to ensure the perfect brew wherever she is.
The food writer and TV chef likes her daily cuppa made in a specific manner and admits: "I am incredibly precise and I know exactly how I want it."
Lawson, 56, also doesn't make any diva demands when it comes to her "rider" and only asks for tea mugs, a kettle and milk in the hotel room fridge.
Although she admits that these days she travels with her own kettle and has started travelling with her own mug because others are "not big enough".
Lawson stars in the new TV advert for tea brand Typhoo and says the partnership is a "natural and happy fit".
"I am a complete nightmare to make tea for," she told the Press Association.
"I like it very strong with some milk in it and I have to have it at the optimum temperature which is just after it's too hot but before it gets anywhere near room temperature."
The How To Be A Domestic Goddess author also always travels with her own tea bags and said she has a "slight superstition" when writing or working on a new recipe.
"I can't wash up the mug that I'm using until the recipe is completed or what I'm writing is completed," she said.
She estimates she drinks "nearer to twelve than eight mugs" of tea a day.
The new advert shows a relaxed and casually-dressed Lawson in a white shirt and jeans as she shares her recipe for a perfect tea moment.
"On a day-to-day basis I just have my two mugs of tea and then I chain-drink tea throughout the day.
"My treat is some toast and good bitter marmalade and a mug of tea, but that's not an everyday matter - I often do that on a Saturday or Sunday," she explained.
Tea has always been in the Lawson family. Her mother Vanessa Salmon was heiress to the Lyons Coffee House dynasty, and she said her grandfather was "said to have the best nose in Mincing Lane", a reference to the London street that became well-known for its tea establishments.
She will be returning to TV screens in Australia on popular cooking show MasterChef as a guest judge, alongside Matt Preston, Gary Mehigan and George Calombaris.
British chef Heston Blumenthal will also be making an appearance as a guest judge on the show.