Same Day Delivery is now available EVERYDAY from Mon-Sun: 3 time slots (1pm-4pm, 5pm-9pm & 7pm-11pm)!
At first, I didn't know how to operate this. I threw away the manual too soon if there was one. Then I figured it's quite flexible. And the most important quality I believe is the last bit of last sentence in the description.
The 'ribbed tunnel' is really just there and doesn't make much a different but maybe it's just me.