Why? It’s simple. “Cold temperatures constrict blood vessels, which can decrease both puffiness and redness, and enhance the soothing sensation of products,” explains Hadley King, MD, board-certified dermatologist in New York City. As a general rule of thumb, “any type of cream- or gel-based product can be kept in the fridge,” says Marina Peredo, MD, board-certified dermatologist in New York City. On the flip side, avoid sticking anything oil-based in there. These types of products will solidify, which can both affect the potency and cause the formula to separate, she notes. Here are five of the best products to house next to your coffee creamer and salad dressing. One to try: First Aid Beauty Detox Eye Roller ($26; amazon.com). Our fave: SkinCeuticals Phyto Corrective Masque ($59; dermstore.com), which works especially well to calm skin after procedures such as microneedling or lasers. Try: Boiron Arnicare Cream ($13; amazon.com). One to try: Typology Radiance Serum 11% Vitamin C ($17; us.typology.com).