I&#x27;m arguing that the capacity of the truck generally does not matter. A toilet bowl has a bounded capacity too. But by the time you&#x27;re thinking about it, you have a different sort of problem.<p>The cutoff windows they do give are too long to support your theory (what if demand then spikes?), unless Amazon also retracts those windows (which would also be customer hostile). I&#x27;m not saying the constraints you describe are impossible, just highly unlikely based on how every other merchant&#x2F;shipper works. The tiny gain from optimally packing trucks does not seem to outweigh the additional complexity required to do so.