OUR MODEL ATHENA HOLDS THE EQUAL TO 2 NAPLES, 2 CUPS OR 4 REGULAR TAMPONS. THIS EQUALS TO APPROXIMATELY 25 ML OF BLOOD OR 10 ML OF LIQUID. MINERVA KEEPS LEAK-PROOF UP TO 1 NAPTURE, 0.5 CUP OR 0.5 REGULAR TAMPON. VENUS TANG HOLDS LEAKPROOF UP TO 0.5 NAPTURES, 1 CUP OR 3 REGULAR TAMPONS. THIS EQUALS APPROXIMATELY 12 ML OF BLOOD. YOU CAN WEAR YOUR GOTYU PERIOD UNDERWEAR FOR UP TO 12 HOURS.