A Freund Exclusive! Mix, dilute, measure and blend solutions in these Kautex wide-neck, leakproof bottles. Graduations are marked in 50 ml increments. These wide-neck bottles are ideal for pastes, granulates and hot filled products. Bottles and caps are autoclavable up to 249° F (121; Celsius). Before autoclaving, screw off the closure and place it upside down on the bottle. To ensure leakproof performance, use only the included cap.