A device in the dispenser which puts up a flag when it is out of paper. Perhaps an audio alarm as well.-- dare99, Mar 15 2002 (For [PeterSealy]) http://www.bootsnal...k/jun99nycity.shtmlA guide to the public toilets of New York City [angel, Mar 15 2002, last modified Oct 05 2004] a different (better) toilet roll thing toilet_20roll_20runout_20warningbaked rolls [neilp, Dec 20 2004] or perhaps an alarm system for when there is anything at all undesirable in the toilet - things floating, wet seat, etc etc.-- sappho, Mar 15 2002 Perhaps a home version with alarm to discourage those significant others who leave the roll empty (or worse with exactly 2 sheets left).?-- rbl, Mar 15 2002 [PeterSealy]: Yes, I noticed. It was largely for that reason that I posted it.-- angel, Mar 15 2002 hmmn, if it could send a message to someone to come and top it up..-- neilp, Dec 19 2004 actually I think is baked with link - both ideas lack a proper alert mechanism.-- neilp, Dec 20 2004 random, halfbakery