While in Nova Scotia this summer, I happened across a fellow collector of bottles and couldn't help myself. I'll post more photos in the coming days after I research some details about date, use, etc.

He mostly found them in the mud flat in behind his house as people used to simply through their garbage into the water. To state the obvious, this is how sea glass begins.

Note how small the cobalt blue medicine bottle is in comparison to the others; this is why cobalt blue sea glass is rare.