Elegant reusable glass bottles with a colourful protective non-slip sleeve These stunningly simple glass bottles demonstrate stylish design and practicality go hand-in-hand – the black+blum signature. The strong and hard wearing Stainless Steel lid is taste neutral, ensuring full glass and stainless steel contact with water. They have even been designed with the thread on the inside of the bottle so the outer lip is smooth to give a better drinking experience. The protective, non-slip silicone sleeve comes in a variety of colours. The Almond has a hard wood fibre sleeve. Each bottle has a convenient Paracord carry loop which is strong and hard wearing whilst water and mildew resistant. It can be used to store hot drinks but caution must be used. The outside sleeve will get hot to the touch and you must make sure the lid is securely screwed shut. The bottle is freezer safe but be careful not to overfill the bottle as water expands by roughly 9% when frozen. Please ensure there is plenty of room at the top. Allow the contents to defrost before attempting to unscrew the top. Features: 100% leakproof Thread on the inside for smooth drinking High quality stainless steel lid Protective non-slip silicone sleeve Paracord carry loop Recyclable Freezer Safe BPA and BPS free Borosilicate glass Size: 600ml Weight: 340g Care: We recommend all parts are hand washed only in order to avoid water being trapped under the sleeve or shortening the life of the nylon paracord, which is not dishwasher safe. For a thorough clean, it is possible to remove the sleeve from the Borosilicate glass body and then reassemble it. Both parts can be cleaned in the dishwasher with the exception of the almond wood fibre sleeve which is not dishwasher safe. Dan Black and Martin Blum met while studying industrial design at Northumbria University. In 1998, not long after graduating, they formed black+blum. With rigorous attention to detail and a focus on re-use and sustainability, they design original products that inspire a sense of wellbeing. They have won over 25 international design awards and many of our their designs are in permanent collections of internationally renowned design museums.