litter box is illustrated in fig5 wherein a specifically designed inexpensive sterile litter box 50 is provided with the bag 32 the litter box 50 is designed with chambers 52 along the bottom to catch the urine more effectively and can incorporate a pour spout 54 for easier removal of the urine the bottom of the litter box 50 can also be manufactured with waffle randomly depressed etc instead of the channels 52 any type of depressions in the bottom can be used to collect the urine and the exact configuration would be based on manufacturing preferences providing pre sterilized litter and bag along with the sterile litter box would allow for collected urine to be analyzed for pathogenic organisms the pre sterilized diagnostic units would also eliminate the need for veterinarians to sterilize the litter boxes after each use the sterile litter box 50 does not need to have the rigidity of a standard litter box due to its limited use and can be sized to fit inside of a standard litter box which would provide the rigidity a mirror image top can be provided to facilitate pouring the urine out of the litter box 50 the bottom snap top combinations are well known in the container art and are used extensively for store salad bars packaging muffins etc an alternative.