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Lambs must take the first intake of colostrum within the first 3 hours after birth, which is essential for their survival. However, some times there might be no enough colostrum to feed newborn lambs, and stored colostrum can be required. In order to keep and conserve colostrum, those sheep producing the best quality one should be selected. The collected colostrum can be kept refrigerated up to 2 days, and frozen up to 2 years. And single dose containers, such as 250 or 300 ml recycled water plastic bottles, allows easy identification, as well as rapid freezing and thawing in a water bath at temperatures below 50ºC. In addition to being light and cheap, plastic bottles allow to keep the colostrum safely and in the best possible conditions.