The 3oz size of these jars makes them ideal for portion control, particularly for those who are mindful of their nutrition. They are perfect for storing snacks like nuts, dried fruits, and even spices. With airtight lids, they can keep contents fresh for longer periods, which is essential for maintaining the quality of your food. These jars are widely used for meal prep—helping individuals organize their meals for the week with ease, preventing food waste, and making healthy eating more convenient.