Even though Data does not need food or drink, many times it has been shown that he does consume foods and drinks. What happens to the food after digestion? Given that he was created as a "fully functional android", should we assume that he gets rid of waste in the human way? Answer I always assumed that since the food he digests is replicated it would simply recycle itself, he might even have had a mechanism for it (I recall him saying somewhere that he does have a "stomach"). I'm not sure if I got the idea from reading/hearing about it somewhere though :)