Container time indicator

A cap having a time indicator thereon, the cap for attachment to a neck of a fluid container, comprising:

• a) said cap having an upper portion and a lower portion, said cap having a wall which forms said cap, said wall having an outer and an inner surface, said lower portion having an opening therein, said opening for receiving a neck of a fluid container, said inner surface of said lower portion having threads for mating to a threaded neck of a fluid container;
• b) a stationary ring disposed on said outer surface of said wall adjacent to said upper portion, said stationary ring encircling said cap in substantially the horizontal plane, wherein said stationary ring comprises first timing indicia corresponding to hours and portions of hours of a selected time cycle spaced apart equally along said stationary ring;
• c) a track recess disposed on said outer surface of said wall adjacent to and below said stationary ring, said track recess encircling said cap in substantially the horizontal plane;
• and,
• d) a rotatable ring slidingly disposed in said track recess, wherein said rotatable ring comprises second timing indicia corresponding to hours and portions of hours of a selected time cycle spaced apart equally along said rotatable ring, wherein said rotatable ring comprises a zero time indication placed at the beginning of said second timing indicia to permit a user to determine the length of time which has passed since the fluid container on which said cap is disposed was filled by placing the zero time indication of the rotatable ring at the first timing Indicia corresponding to the actual time the fluid container was filed and then reading the length of time from the second timing indicia corresponding to the current actual time as read from the first timing indicia.