KeepCup have chosen to use stainless steel because of its durability, reuse longevity and that it is a 100% recyclable resource without degradation.
Stainless steel 18/8 is well known for its antibacterial and hygienic properties which means it does not need an interior coating or lining and is easy to clean with no metallic aftertaste.
Double walled and vacuum sealed, it is safe and comfortable to hold both hot and cold beverages, with lasting drinking pleasure.
KeepCup Thermal use grade 18/8 (also referred to as type 304) which is the most common stainless steel used with food preparation and dining. The "grade" of stainless steel refers to the amount of chromium and nickel found within it, the percentage of which is used to designate and determine the material best fit for purpose.