The largest ant farm habitat is 1.2 m (3 ft 11 in) height x 0.9 m (2 ft 11 in) width and 0.08 m (3 in) depth, achieved by Colgate Palmolive Ltd in Singapore, Singapore, on 28 December 2008.
The habitat was used as a promotion for Colgate Anti Cavity toothpaste. Bus shelter ad was set up by BusAds of Singapore with special gel manufactured in China. About 200-300 ants were released into the habitat, which started digging within 24 hours, creating mini tunnels within the gel, thus giving the impression that the 'tooth' had cavities.
Comments below may relate to previous holders of this record.