An adult incontinence nappy, designed for concertgoers to avoid long queues at toilets, has gone on sale.

The limited-editon Pit Diaper, specifically for mosh pits at music gigs, was available for $75 (£59) before selling out.

It was sold by US firm Liquid Death, a sparkling water brand known for its unusual heavy metal-style images and marketing.

The firm's promotional material said: "If you've been to a concert, you know the scariest place isn't the mosh pit. It's the bathroom.

"Now you can avoid having to brave that hellscape with the new Pit Diaper," adding that it helps fans "relieve themselves in the safety of the mosh pit".

The company has teamed up with an adult incontinence brand to produce the black pleather accessory, which includes metal studs and chains.