Fig. 1From: The international food unit: a new measurement aid that can improve portion size estimation a The International Food Unitâ„¢ (IFUâ„¢): A 4x4x4 cm cube with a volume of 64cm3 (64 ml), which can be subdivided into 8 smaller cubes (2x2x2cm = 8 cm3 (8 ml)) to estimate smaller volumes b. The present study tested the performance of the IFUâ„¢ as a measurement aidBack to article page