Spectators at the 2020 Tokyo Olympics can each bring one bottled non-alcoholic drink up to 750 ml into venues as a "special measure" to combat sweltering temperatures, organizers said Friday.

"(Bottled drinks) weren't allowed at the games in London and Rio (de Janeiro) for security reasons, but it'll be important to have them on hand given the heat," 2020 Tokyo Games delivery officer Hidemasa Nakamura said.

The organizers said they were still to decide on detailed criteria about what kind of containers would be permitted inside venues at the July 24 to Aug. 9 games.