The incident happened in an eatery in the Jan Breydelstraat last night. The punter was taken to hospital. He is in a bad way but not in a life-threatening condition.
The public prosecutor is examining the incident. So far there is no evidence of malicious intent. A staff member is said not to have been aware that a bottle of sparkling water really contained a caustic detergent.
The eatery is closed for now.