Have a flexible spending account? Amazon has a page for you. There you’ll find “surprisingly eligible” items you can use that money for: tampons, pimple patches, laxatives, sunscreens. The website for Oura, which is currently running a $249 sale on its sleep-tracking rings, also notes that you can pay with FSA dollars. Even a company called Premier Bidets advertises a way for customers to use their FSA dollars to purchase “high-quality bidet products.” FSAs allow people to set aside money from their paychecks, pretax, that they can use for approved medical expenses.