Heavy-duty, reusable storage for media and other biological solutions. Supplied with one-piece polypropylene plug seal caps and clear polypropylene drip-free pouring rings. The 25 ml size does not have a pouring ring. All parts withstand repeated autoclaving (140°C). Bottles larger than 2 L should not have caps tightened immediately after autoclaving because the vacuum resulting from cooling can cause breakage. Cap size 25ml - GL25, 50 ml - GL32, remainder - GL45.