Ikea does this with their app, but generally, you go to ikea to get one or two items, so it doesn’t really speed up the proccess of checking out

I sliced a memory foam pillow to half thickness with a single edge razor and put it in the same case as a firm pillow. It’s stiff as fuck for the first week or 2, but hoo boy is it the best pillow I’ve ever had. My wife kept stealing my pillow, so she got the other half of the foam pillow