Only used once - Colostrum collector to feed the baby upon birth. You can start harvesting your colostrum after 37 weeks of gestation The Haakaa Silicone Colostrum Collector is a world-first design, giving moms the option to express colostrum antenatally and postnatally in a safe, easy-to-use storage solution. Colostrum is traditionally collected in single-use syringes often made from harmful plastics. Our collector is made of 100% medical grade silicone, which means it won't leach nasty toxins and can be safely stored in the fridge or freezer. It's easy-to-use and reuse, making it the ideal option for moms both before and after birth!