"The toilet only needs four-and-a-half litres for a large flush and a mere three litres for a small one," said Villeroy & Boch. "This way, a four-person family can save up to 19,700 litres of ...

For Dezeen's latest competition, German ceramics brand Villeroy & Boch is giving 10 architects or interior designers based in the UK the chance to win a toilet with TwistFlush technology. This ...