Lid may have slight resistance when new, will become smoother with use. Avoid using with milk, baby food, ice, or carbonated beverages. Do not use hard brushes or abrasive cleaners on the tumbler. Do not overfill with water. Do not microwave or dishwasher. Read the instruction manual before use. Be cautious of high-temperature liquids causing pressure buildup.
Measurements are approximate and may vary slightly.