The sterile Whirl-Pak® Stand-Up Bag makes sample handling and testing much easier because the bag will stand completely by itself. When the sample is placed inside, the special gusseted bottom flattens out, allowing the bag to stand up on its own. It works just like a beaker or bottle, however, it costs less, is sterilized, and uses only a fraction of storage space as the other containers. Bags should not be used at temperatures above 82 °C.