Suvarnabhumi has called on airport users not to make religious offerings to the giants that are some of the most famous sculptures at Thailand's international gateway.
The airport made the call on Monday after dozens of red soda drinks were found at the feet of Suriyaphob, one of the giants in the departure hall.
The airport said security camera footage showed a man placing the bottles before Suriyaphob at 5.08pm on Sunday.
Cleaners have been ordered to collect and throw away anything found near the giants, the airport said. The sculptures are there to represent Thai traditional arts and worshipping is not allowed.
The red soda bottles are widely used as offerings to spirit houses and holy sculptures throughout the country.
