This is a Letterbox Cache, that can be found at the Posted Coordinates.
Small twist top water testing bottle.
Bronte Creek
Bronte Creek is a waterway in the Lake Ontario watershed. It runs through Hamilton and Halton Region, with its source near Morriston, (south of the intersection of Highway 6 and Highway 401, passing Bronte Creek Provincial Park, on its way to Lake Ontario at Bronte Harbour, in Oakville, where the creek is also known as Twelve Mile Creek. It was previously known to the Mississauga Natives as Esqui-sink, Eshkwessing or ishkwessin (that which lies at the end).