Chances are this €5 product is one of your must-haves too.

As a teenager, I remember first using tea-tree oil for spots before an expensive obsession with skincare kicked in but years later, it's still something that comes in very handy when you've run out of your usual must-haves. It turns out that Meghan Markle is also a fan of the ever practical tea-tree oil and previously named it as a product she 'can't live without'. Yep, it turns out the Duchess of Sussex swears by the stuff and brings it with her when she's away from home. During her time in Suits, Meghan gave interviews regularly and was often asked about her favourite fashion purchases and beauty products. Chatting to Allure previously, she mentioned how she always brings tea-tree oil on her travels.

"The one thing that I cannot live without when I'm travelling is a small container of tea tree oil. "It's not the most glamorous thing, but if you get a cut, a mosquito bite, a small breakout, no matter what it is, it's my little cure-all. "It's inexpensive, it's small enough to carry on, and I bring it with me all the time".

Both Meghan and her husband, Prince Harry, love visiting new places and previously spoke of how a safari camp in Botswana holds special memories of their first holiday together. Their honeymoon was in Canada and they're due to take a royal tour later this year taking in Australia, New Zealand and Fiji. As Meghan says, it's one of those products, similar to Sudocream or Vaseline, that has numerous uses and so if you don't have one to hand, it's wise to pick some up. You can pick tea-tree oil for up as little as €5, noticeably less than one of Kate Middleton's faves, this facial oil priced at €45.