Listed as 270ml to match the label however this cup has a 350ml capacity, the label was misprinted.Double walled vacuum sealed technology, meaning the space between the stainless steel walls is void of matter.This cup will keep your beverage cold up to 9 hours and your drink hot up to 3 hours.Crafted from 304 grade 18/8 stainless steel.The double wall vacuum insulation prevents condensation from ever forming on the exterior.The BPA free push seal lid was newly designed in July of 2017 to seal tightly while allowing you to see inside of your tumbler.FDA approved, highly resistant to rust and to absorbing odour, taste or bacteria.They are easy to clean by hand.Dishwasher safe however hand washing is recommended & shatter resistant.Copper coated inner walls with double-layer stainless steel provides an additional barrier against heat entering or exiting the vessel.The double wall prevents condensation from ever forming on the exterior.Hot liquids will not impact the exterior, either.Your wine cup will always be comfortable to hold and never make a watery mess on your table.