Oatmeal or chia pudding can be kept in the refrigerator for up to two days. It is not unhealthy to eat the recipe several days later, but the fresher, the tastier. Smoothies and juices can be kept in a sealed bottle or mug in the fridge for up to two days, or in the freezer for up to two weeks. Fresh, of course, remains the most delicious. Fresh soups can be kept in a closed container or pan in the refrigerator for up to four days. You can also easily freeze soup. Eat it within a month.    Most snacks (such as carrot cake muffins, banana bread and apple cake) will keep for up to two weeks in the refrigerator and four to six weeks in the freezer. Dry snacks (such as muffins and bread) are best stored outside the refrigerator in a plastic container with a lid. Spreads and sauces can be kept in the refrigerator for five to seven days in a sealed container (airtight). If you drizzle a small layer of olive oil on top of pesto, it will stay tasty even longer.