Store your coleslaw in a glass container with a tight lid for up to 3 days in the fridge. I don't recommend freezing this dish at all. The mayonnaise will separate and the cabbage will lose its crunch once thawed which results in a mushy mess. Give the bowl a vigorous stir for 30 seconds before serving to redistribute the dressing. If you notice a sour smell or the cabbage turning grey, throw it out immediately. It should always smell fresh and look bright.