Nalgene 6501 LDPE Safety Bottle Carriers. Safely and easily hold 2.5L and 4L chemical bottles, with or without finger loops. These carriers hold and protect standard acid and chemical bottles and permit pouring without removing the bottles. A clear polycarbonate cap protects bottle closure and allows identification of color-coded closure on acid bottles. Cap twists for removal from cover, so there is no need to remove bottle from carrier to pour. Epoxy-coated handle locks in place while carrying contents. Carrier cushions glass bottles from breakage.