Foxx Life Sciences Borosil® Reagent Bottles with Ground Glass Stopper and Graduations, 2L (2000mL), 10/CS. Borosil® Reagent Bottles are perfect for storing media, solvents, and other materials. Sturdy ground glass necks for long-term durability. Solid glass flat-head stoppers, easy-to-read graduations and capacities, marking spots for labeling.