1. Food Grade Quality: They’re made of high-quality crystal glass, that is non-toxic and dishwasher safe, our water cups are odorless and won’t leave an unpleasant metal aftertaste. They can be used many times and the sturdy bottom ensures the bottle wouldn’t fall down easily.2. Adorable Design: These tumblers come with a modern and adorable design, they are great for the daily use of all your cold beverage needs. Add a touch of Summer mood with these glass tumblers to your living space.3. Comes With Straw: You can drink directly at the opening of the glass cup or enjoy your delicious drink with the straw provided. Drinking through a straw is better for your teeth since it can effectively lower the risk of acid and sugar damage to your teeth. The beverage will not come in contact with your teeth directly.4. Wide Application: Ideal for use at home or in the office. Traveling around with these tumbles can reduce the use of plastic bottles or paper cups.5. Dimension: 8.8 x 14.5cm, capacity: 450ml, with scale, 4 patterns optional, you can choose what you like.