Yeah I had a similar experience and couldn’t get the object out. Hid it from my parents for 3 days and was not doing well. Couldn’t eat and turned out internal bleeding and had I not gone to the hospital - sepsis.
I still love anal play but when I see videos of people putting jumbo sized cans up their butts, I freak out and can’t watch. Your body is a vacuum and will suck something like a can or other objects in and out of reach.
I’ve never seen them in gas stations or hardware stores in my state before but I’m not a chemist and want to be safe too so I wouldn’t exactly feel comfortable trusting myself not to grab something that could end up being harmful. Feel free to DM me if you find more specific info on where your friend gets them