Shrink Bands with High Alert Caution Text for 10 mL Vials 250/BoxShrink bands with the text "High Alert Caution" are special packaging materials used to denote products or packages that contain high risk or hazardous materials. The bands are made of heat shrinkable plastic that is applied over the cap or lid of a container and is then heated to shrink and securely seal the band in place. The text "High Alert Caution" on the shrink bands is a warning message that alerts handlers and consumers to exercise caution