Ali Carnegie, of adult-store www.LoveHoney.co.uk, said the firm is already on the verge of selling out of the bullet-sized device before Christmas.

She said its inconspicuous design has been a big winner with women and claims the sex toy, totally unrelated to Apple, is perfect for giving users "big smiles on their way to work".

Jessamy Hawley, of Gadget Candy - a technology website aimed at women - believes combining two female passions is sure to prove a No1 hit.