Eisco Labs 500ml Amber Reagent Bottle with Screw Cap and 50ml Graduations500ml capacity reagent bottle made of high quality, amber colored Borosilicate 3.3 glass. Bottle features white, 50ml graduation lines that are marked every 100ml. As per DIN ISO 4796-1 standard. Equipped with an orange, GL 45 screw cap and features a drip free pouring ring for cleaner, safer transfers of liquids and