Apparently back in the 1970s, people weren’t really envisioning the iPhone. Instead, this was someone’s vision of the future, and you were cutting edge if you had one of these portable phone/bags that you could take with you and hook into any phone jack at your convenience.
I’m not exactly sure how this was supposed to work, because didn’t most phone jacks generally have phones already plugged into them? So were you supposed to unplug an already existing phone so you could plug in your own phone/bag/purse? That just seems a little unnecessary.
A company called La Pochette that sells vintage purses is offering these retro bags for $295 each, and they actually work . . . if you can still find a phone jack.