Laying cold cucumber slices over your eyes may look a little silly, but the age-old beauty trick really does reduce puffiness. Cucumbers, which are 95% water, offer a nice cooling sensation and the cold temperature causes blood vessels to constrict and reduce inflammation. And there’s a reason why cucumbers in particular work even better than ice packs. “Cucumber slices perfectly fit to the contours of your eyes to help reduce swelling,” Dr. Mariwalla says. You’ll only need to leave them on for 10 minutes for fresher-looking eyes.