Ballooned

We spotted these old cannisters on a big exploration mission on Sunday. We biked up to Point Richmond for the first time which was fun and I only noticed these on our way back through the industrial stretch of our route. They're the kind for storing gases like helium and they had such good colors that I wanted to document. Old carnival waste maybe? Or evidence of birthday parties past? I can't imagine what else these are for, and even though the place housing them seemed abandoned they manage to muster some romance, don't you think?