Nalgene® Polysulfone Reusable Bottle Top Filters offer the convenience of a bottle top filter with the cost savings and waste reduction of a reusable filter housing. The deep threads screw securely onto the bottle for convenient filling and vacuum filtration.

The filters feature a removable sterilization membrane support plate designed to provide maximum flow rate and throughput, as well as a vacuum port on the lower half of the assembly and molded-in graduations. The polypropylene tubing adapter can be stuffed with cotton for sterile venting during autoclaving.

The deep threads screw securely onto the bottle for convenient filling and vacuum filtration.