This is why there are orange water bottles floating in Lake Ontario Stay in the loop Sign up for our free email newsletter. Unsubscribe anytime or contact us for details. If you happen to spot a bright orange water bottle floating along the Toronto Harbour this summer, you can be sure that it's not just another piece of trash contaminating Lake Ontario — quite the opposite. The orange bottles are actually a part of the University of Toronto's Tagging Trash Project, which aims to uncover how litter travels within the waterfront in order to help target litter hotspots and ultimately reduce pollution.