A 3 L bag for handling colostrum from the cow to the calf without moving it between containers. You can collect, pasteurise, refrigerate, freeze, warm and feed from the same bag, and it's designed for single use.
To warm frozen colostrum, use a water bath no hotter than 60 °C. A nipple or esophageal feeder attaches to the bag to feed (these come in the kit).