I'm in the UK and Amazon has offered this for a while now - they call it Amazon Day. I don't order regularly enough for it to be worth it, but I think the idea is that you order whatever through the week and it's all delivered together on one day each week.

Interesting, I wish they would bring that to Canada. I hate seeing my recycling bin full of one time use cardboard boxes. There's a small chain of hardware stores in North America called Lee Valley (think specialty hardware and tools, not HomeDepot). The owner was so annoyed at all the boxes he offered to pay anyone $0.25 for any box they brought it. He even used not so subtle language like "Those boxes with a smile." It was during the pandemic so I suspect it was a little self serving (ex. their supply of boxes was hard to come by or their cost was greater than $0.25 for regular boxes), but the message came off as very genuine.

Perhaps they've improved this, but when I tried using "Amazon Day", it just meant fewer deliveries, but those deliveries still resulted in the same number of boxes.

It also, hilariously, sometimes didn't even result in fewer deliveries, just all of those deliveries occurring on one day.

I almost always choose "Amazon Day". Most of the time the orders get consolidated into fewer boxes (not always, though).

Even if it only occasionally results in fewer deliveries, Amazon Day is still an efficiency win.

I have Amazon Day in NYC as well. Wasn't aware that it doesn't exist everywhere.