It is timeless. It is sleek. This is the Series 2 bottle in granite. This is reusable design at its best. 24 hours cold: Ice-cold drinks for up to 24 hours, regardless of the outside temperature. Thanks to modern double-wall vacuum insulation, warm water is a thing of the past. 12 hours hot: Keep your tea or coffee warm for up to 12 hours. Perfect for all winter walks and the commute to work on cold mornings. Caution - Chilly's works a little too well. Airtight, leak-proof: The airtight screw cap prevents soaked bags and accidental spills. With vacuum insulation, your Chilly's bottle remains condensation-free. Chilly's bottles are made with robust, high-quality 304 stainless steel for both the inner and outer walls. This preserves the taste and freshness of your drink without any discoloration. Quality materials, BPA-free.