Not what I expected
I googled for ‘helium tanks‘; the first link was Amazon. I wasn’t expecting Amazon to be selling helium, but I clicked – it’s for balloons. The top two “people who buy this also buy” items? “Peaceful Pill” (which I hadn’t heard of) and “Final Exit“, which I had.
I’m sure there’s a cross-marketing idea here, but I’m not sure what it would be. Not a lot of repeat business, for sure.