Apple cider vinegar ($3) is one of those products that has gained a sort of cult of devotees — and for good reason. If you're out of that expensive toner, sub in diluted ACV; it contains acetic acid and AHAs that minimize pores and reveal brighter skin. ACV is also known for lowering your skin's natural pH levels, making it a go-to when you have any skin issue that needs healing — think: sunburns, bruises, and even acne. Just make sure to always dilute it with water so it doesn't sting, and only use it once a week.