These heavy duty borosilicate glass round bottles can be used for storage as well as mixing and sampling. They include a linerless autoclavable blue polypropylene plug seal GL45 threaded cap with a drip-free pouring ring. Media Bottle are leak-proof. Max temperature of 140 degrees Celsius (284 degrees Fahrenheit). Available in 8 sizes - 50ml, 100ml, 250ml, 500ml, 1000ml, 2L, 5L, & 10L