[kilo_bravo_3]

In my region, not only is there a slow ship option, there is also a delivery day option.

With delivery day, you can bundle up all of your orders for the week and have them delivered in a single large shipment on a pre-specified day, Monday through Saturday.

You pick your day, and you have the option to make it the default on all future orders, and then you get one big box.

I don't know if it varies by region but with my account they are prominently displayed radio buttons on the "Review items and shipping" part of the checkout page.