meaning in context - What does "drive-in teller" mean?

Sometimes they are called drive-throughs, or even drive-ups, at least in the U.S.

Essentially, it's a way to visit the bank without getting out of your car. Some drive-throughs only have an ATM, others let you interact with a bank teller.

The left half of the picture below shows a bank's ATM drive-thru. On the right, a teller is putting said canister in the chute, which will then be transported to the customer in his car. Notice the microphone used to communicate between the teller in the bank and the customer in his car.