Borosilicate glass tumbler with a silicone protective sleeve and a bamboo lid and straw. Capacity 450ml. Enjoy a healthy lifestyle and stay hydrated throughout the day. This tumbler helps you with that and it looks stylish and natural thanks to the bamboo elements. As this is a single wall mug, heat transfer can still occur. Bamboo is a natural product, there may be slight variations in colour and size per item, which can affect the final decoration outcome