Whirl-Pak B01065 Write-On Bags - 18 oz. (532 ml) - Box of 500 - Yellow Tape

These sterile write-on bags are designed for collecting, storing, and transporting liquid, solid, or semi-solid samples in laboratory, food safety, and environmental testing workflows. The built-in labeling strip helps maintain clear sample identification.

Each bag has an approximate 18 oz (532 mL) capacity and measures about 4.5 × 9 inches (11.5 × 23 cm) when laid flat, providing ample space for routine sample collection.

The white write-on area accepts ballpoint pen, pencil, or marker, allowing fast, smear-resistant labeling directly on the bag. This improves traceability and reduces the risk of sample mix-ups in busy labs.

Yes. The bags are post-manufacture sterilized and feature a continuous perimeter seal with secure wire closure tabs to help prevent leaks and maintain sample integrity during transport.

Whirl-Pak write-on bags can be frozen to extremely low temperatures (down to about −210 °C) but should not be used above 82 °C (180 °F). This makes them suitable for cold storage and many routine sampling environments.