SAFE AND RELIABLE MATERIALS: Mason jars drinking cups are made of high quality glass, food grade natural bamboo lids and stainless steel straws. This thick, clear glass can withstand sudden changes in temperature between -66°F and 210°F. The seal is better and fits the jar perfectly. They are safe, reusable and environmentally friendly, so you can store food and beverages with confidence. LARGE CAPACITY: This Mason jar with handle has a capacity of 25 oz/710 ml and a 2.2" wide mouth, large enough to hold more juice or coffee. You can put large pieces of pulp or other ingredients into the cup for garnish when you make your own juice. MASON JAR SET: 2 glass 25 oz. mugs with 2 glass straws, 2 bamboo lids, 1 straw brush and 1 mug brush. Each glass measures 6.3 inches in height and 2.8 inches in width. The length of the straw is 8.3 inches, which means that even when fully inserted into the glass, you still have the proper length. Perfect for your everyday use. MULTIFUNCTIONAL AND VERSATILE:Bubble tea cups are perfect to carry around with you and are suitable for home, kitchen, travel, office, camping, bars, restaurants, etc. You can use it to make the perfect tea, canned fruit, pearl milk tea, iced coffee, smoothies, juice or any other drinks. EASY TO CLEAN. With the wide mouth design of the glass, you can clean it easily. The wide angle straw is perfect for easy drinking of pearls in pearl milk tea and for making smoothies. The bamboo lid substance prevents all corrosion. Each package also includes a straw brush, the cleaning brush can help you clean quickly. NOTE: Mason jars are safe and durable. The glass material does not contain harmful substances BPA and PVC, so you can rest assured during use. However, do not use the cup to fill the freshly boiled water. And after using the Mason jar, pay attention to clean the lid.