WHEATON®, 500mL Lab Media Bottles, GL-45, Borosilicate Glass . WHEATON® Glass Media Bottles, 500mL or 16oz Clear 45mm (GL45) Finish, Type I Borosilicate Glass. (500 mL Bottle, Lab 45, Clear Type I, Safety Coated, Cap) These safety coated 500 mL lab quality media bottles are manufactured from Type 1 borosilicate glass which provides the best