Thank you for purchasing a Stanley product! Please read the following information before using this product. If you have any questions regarding these instructions, please contact us for further explanation. This product is intended for cold use only. Do not use with carbonated, citrus, or fermenting beverages or foods. Do not use with hot liquids. Doing so may cause pressure buildup and lead to lid failure and risk of forceful ejection of lid and contents, which can cause injury. Do not use milk products or baby food. To be fully leak-proof, ensure the lid, drink spout, and straw are all assembled properly, fully closed, and tightened. Do not overfill; overfilling can cause spillage. Do not use in microwave or oven. Do not freeze. Freezing may change performance. Wash before use. Dishwasher safe. Do not wash in commercial-strength appliances or on high heat settings. This can lead to wear and reduced chemical performance. Do not use dishwashing detergents that contain high levels of chlorine or bleach. This can lead to vacuum failure and reduced thermal performance. Dishwashing may age the appearance of your item faster than hand washing. If preserving the finish of any paint and artwork on your item is important to you, we recommend hand washing. To remove stubborn stains: soak overnight with a solution of warm water and baking soda. Remove lid during soak to ensure pressure does not build up. Hand Wash Instructions Use mild detergent and warm water. To remove stubborn stains: soak overnight with a solution of warm water and baking soda. Remove lid during soak to ensure pressure does not build up. Do not use bleach or cleansers containing chlorine to clean.