It feels worth noticing the parts of our lives that are set up to make some regular use of disposable items. Whether it's plastic bottles of water, plastic bags at the grocery or styrofoam coffee cups, there are a lot of things we use once or only a few times and then throw away when we don't necessarily need to.
Recently I went looking for a more sustainable way to shave, so that I didn't have to throw away as many of those ridiculously expensive blade cartridges.
At some points in life I've used an electric razor, which had fewer parts that needed regular replacing. I suppose you could try to make the case that a really well-engineered electric razor with a long-lasting battery could end up being lower resource usage than the manual razor with cartridges, but as electric razors got more crazy in their design ("buy this special gel-pack that only fits this one model of razor so it can automatically douse your face with soothing chemicals at just the right time!") it felt simpler - and, okay, a little more manly - to just drag a blade across my face by hand.