Longxiang bus drivers must drive smoothly or they will spill water hanging in a bowl beside them.
A bus company in China has launched a new 'drive safely' campaign - by hanging big bowls of water next to their drivers.
The Longxiang Public Bus Company in Changsha, Hunan province, says drivers must drive gently to avoid spilling any water.
Bus drivers are expected to ensure the bowls are still full when they finish their shift.
And the company warns drivers that CCTV footage will be studied to make sure they do not top up the bowls with water.