Dr. Brown's Convertible Bottle Tote holds up to four bottles of varying sizes, ideal for transporting bottles to work or daycare. This bottle tote easily folds flat when not in use or folds over and fastens for a snug fit when storing shorter bottles or other small items; easily folds flat when not in use. This tote is made with neoprene for a water resistant, insulated, and cushioned bottle cooler, with an easy to clean interior and removable ice pack. Do not immerse in water- wipe only. The outer material is 100% Neoprene and Lining is 100% Vinyl.