Double-walled vacuum flask for maximum insulation. Suitable for hot and cold drinks. Help eliminate single use plastic bottles. An eco-friendly choice. Although this product has been designed and produced with the utmost care, we highly recommend the following cleaning instructions: • Handwash only. • Use mild soapy warm water and a clean soft cloth to clean the outside. • Use a bottle brush if needed to clean the inside of the product. • Do not use scourers or abrasive materials when handwashing. • Coated items may scratch when subjected to sharp or abrasive materials.