Pictured right, carrying the 'Mollie Satchel' during an appearance at BBC Radio 1 yesterday, King showed off the bag, made from fine Italian leather.
King follows in the footsteps of model Florence Brudenell-Bruce, who briefly dated Prince Harry last year after the breakdown of her relationship with Formula One driver Jenson Button.
Recent reports have said that the 24-year-old singer, who first met Harry two years ago, has spent an increased amount of time with the Royal, while attempting to keep news of their romance secret.
During the interview on Radio 1 yesterday, King dodged questions about the claims, while DJ Nick Grimshaw quipped about "big rumours in all the papers".
The Mollie Satchel, available in black, tan and cram, is on sale at selected Aspinal of London stories priced £450.
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Watch The Saturdays' video for new single '30 Days' below: