I don’t know if hour glasses belong in there. Surely those were already mostly decorative when the first hourglass computer icons were developed. Also, I would imagine that most young people still have to occasionally interact with envelopes (government stuff, maybe paying some bills) and cylindrical dry batteries (TV remotes, home thermostats).
> Surely [hour glasses] were already mostly decorative when the first hourglass computer icons were developed
I was a toddler when these icons were created, but I can think of two notable exceptions: egg timers (which my family still used when I was a kid) and board game timers (the canonical example of which, in my mind, is the one that used to ship with Boggle).
