Now that CoffeeAndACig has made this discovery (which is remarkable, BTW - please do not take this as a slam, or to any research that's been done), I ultimately don't think sleuthing the actual pillow sham and towel, their brands, designs or distribution will advance the case. My generalization is based on the research which proves that the Wamsutta brand(s) have been readily sold in the greater metropolitan NYC area for many years at several stores. The sheets themselves are a standard thread count that was normal in the 90s. I think this same type of research, broadly, will or would prove true for the green storage tote, unless it was traced in a very specific way to a certain region, store, etc.
What I do think this gives us, as some have stated, is a new or different psychological angle to examine. Who would have floral sheets or use floral pillow shams? Many people don't bother with them, but often keep them. If you used the shams, were they on your bed, or in a guest bedroom? Where do you keep the pieces of bedding or toweling that you don't want to get rid of but don't use? A linen closet, cupboard or drawer? Do you turn them into dust rags, like my mom did with old sheets?
Who owns a storage tote? Where do you keep them? What do you put in them? Probably in a garage, or shed. You keep tools in those places. How was Peaches dismembered? Cleanly, with surgical precision, or with a blunt action that might suggest a saw, axe, hatchet or chainsaw? Could the towel and sham been handy because they were being used as shop rags? Could they have wiped blood away, then been discarded inside the tote to conceal them? Where was the dismemberment performed? If a garage has a drain, you could possibly hose most of the liquid mess away. You might only be left with the actual body and a little bit of cleanup. Nobody would miss "rags." (I do want to say that the combo of the sham and the towel make me think about a man being unprepared for the size of the mess, and so he grabs something to mop up, but doesn't realize that what he's picked won't help him that much. Making rookie mistakes, maybe.) So do these things point to the killer living with someone else, having a significant other, or perhaps even living with Peaches herself (and possibly Baby Doe?)?
Someone astutely mentioned that toddlers just don't "go missing." I think that's absolutely accurate. So if Peaches and Baby Doe weren't reported missing as a pair, that implies something to me. Assuming there IS a missing persons report for Peaches and NOT for Baby Doe, that would tell me that Peaches's family isn't aware of Baby Doe's existence and therefore don't know to report Baby Doe missing. It would also imply to me that Peaches went missing before she received her tattoo and/or Baby Doe's birth (likely the source of the C-section scar), either of which would probably be mentioned as an identifying mark. We know that toddlers - whose existence was known to more than just their mother - have gone missing and not been reported by people with that awareness. And we know those cases end badly. So if there is no report for Baby Doe, either no one knows about her, or the person/people who did wanted her gone with Peaches or willfully looked the other way.