I haven't seen them for years. You pull up to that machine in a bank parking lot, put your deposit/withdrawal & stuff in that plastic tube & it whooshes it to someone in the bank who puts your cash or balance slip back in the tube & whooshes it back to you.
You don't have to get out of your car.
I've also seen those at Costco years ago, but I don't shop there, so I don't know if they still use them. Cashiers put the money in them & it whooshes it to the office so there isn't much cash in the registers.