TOP QUALITY MATERIAL: FMW water bottles are made of durable borosilicate single-wall glass to avoid cracking in acute hot or cold. Soft linen fabric carry bag can make it easy to carry around and also provides protections against damages and collisions. ⠀ ELEGANT DESIGN: The inner part of the water bottle lid is made of stainless steel making it splash proof and the outer part is made of bamboo. The uniquely designed anti-slip silicon thermal sleeve helps you to hold the water bottle firmly on the go. ⠀ NON-TOXIC: FMW running water bottles are free from Plastic, BPA (Bisphenol A), BPS (Bisphenol S), PVC and lead. No toxic plastic or chemical fumes are used and dishwasher safe (temp -20C to 200C). Certified and tested each product to the highest standards.