BugStopper™ is a novel, reusable closure, providing an ideal sterile vent for culture vessels. It replaces traditional methods of venting at minimal cost and maintains sample integrity. The device is manufactured from biosafe silicone rubber and the vent is a hydrophobic ultra-fine glass microfiber filter reinforced with polyester monofilament laminates. A stainless steel reinforcement ring surrounds the vent for added support.

The device prevents bacteria or viruses from entering or exiting the culture vessel while at the same time allowing the free passage of air and gases through the vent layer. It has a filter rating of 99.9% bacterial filtration efficiency (BFE) and viral efficiency (VFE).

BugStopper is available in two sizes and simply pushes onto a variety of culture vessels. The device fits inside typical 250 to 2500 ml flasks and on the outside of typical 125 ml flasks. The silicone portion of the smaller BugStopper device can be penetrated with needles for use as a sample port or for gas infusion. BugStopper 10 fits flasks which accept size 8 1/2 to 10 1/2 stoppers (stopper sizes are country-dependent. Sizes stated are those in use in the USA. See Technical Data table for actual dimensions of BugStopper).

• Autoclavable in use to maintain solution integrity
• Available in two sizes to fit a wide variety of culture flasks
• Repeated use minimizes cost
• Quick and easy-to-use BugStopper pushes into place and is ready to use

• Bacterial cultures
• Viral cultures
• Cell cultures