A number of products are available for this growing industry. The durable Uni-Body valve attaches to the I.B.C. liner by way of a union-like Buttress threaded Flange. A probe cutter allows the valve to be attached securely to the liner in any position, providing a positive seal connection before the liner membrane is pierced for evacuation. The I.B.C. Valve and Flanges are available in a variety of configurations. In addition, the Flanges are available in both PVC and LLDPE materials.