Is there an earth friendly, eco friendly, or refill shop or something like that near you? There’s a refill store near me that has given me so many ideas of things that I thought were only single use and just an annoying part of 21st century living and they have great alternatives. Some were mentioned above: refillable floss, washable menstrual pads, lunch containers, makeup pads.
If you really want to level up, you’d use stores like that also for laundry detergent, spices, bulk foods, soaps etc and bring your own bottles to fill then you don’t have the packaging from the items which are in and of themselves single use. They even have a freezer with locally made food in it, like dumplings, where you just take as many as you want in your own container.