The Obersee Baby Bottle Cooler Attachment features a top carry handle, an exterior pocket for extras, and an insulated interior. It can be attached to any Obersee diaper bag intended for use with detachable coolers (sold separately) or be used alone as a baby bottle / snack cooler. It features long adjustable straps, which allow for easy carrying or easy attachment to a stroller. Holds up to 3 baby bottles.