Product details:

The Standard Mouth 21 oz (620 mL) DYLN Bottle increases your water's pH up to 9+ to create alkaline water in minutes. The magnesium inside the VitaBead Diffuserlocated at the bottom of the DYLN Bottle alkalizes and enhances the water for superior hydration. Each Diffuser lasts three months on average (or up to 300 liters). The double-walled vacuum insulation, with a copper coating, will keep your water cold all dayeasily add ice cubes though the cap opening The DYLN Bottle's high quality construction consists of Japanese Surgical-Grade 316 stainless steel on the interior and sturdier Food-Grade 304 Stainless Steel on the exterior. The vacuum-sealed insulation will keep your beverage cold up to 24 hours, and the durable powder-coat finish keeps your bottle sweat-free.