PORTABLE SIZE: Each features 3’’x 1.7’’, and 2.7 oz(80ml). Perfect Size for packing sauces, salad dressings, peanut butter, jams, dressings, snacks, etc. RELIABLE MATERIAL: The small containers are made of high quality glass which is eco-friendly, reusable, and doesn’t contain anything harmful. The lids are made of BPA free plastic which is strong and long lasting. The containers are so versatile as they are Dishwasher, Fridge and Freezer safe. LEAKPROOF: The plastic lids are equipped with rubber rings to ensure better air-tightness. They can keep the dipping condiment cups sealed and keep the sauce or condiment inside fresh. No spills or leaks would happened in your bag.