THE beverage sector spent the most on advertising in May, shelling out an estimated US$1.3 million on promotion, according to a new survey. Indochina Research Ltd’s (IRL) monthly ad spending poll, released late last week, found the drinks sector to be Cambodia’s highest-spending sector. It pipped spending from telcos, estimated at $900,416, and personal care businesses, measured at $770,609, to take first place. This year, the beverage industry has spent almost $6 million to date on advertising, IRL says.