Sendai-doko Pentagonal Cup

Odd-angled sake cups with sharp angles fit securely in the hand while minimising the surface area in contact with the sake. Despite the high thermal conductivity of copperware, this design helps maintain the temperature of the sake for a relatively long time.
Copperware also enhances the sake's natural aroma and flavour, making it ideal for rich, full-bodied drinks such as wheat beer, stout, IPA and whisky highballs, rather than drinks that are meant to be consumed quickly.

・Copper is a soft metal. To prevent deformation or damage, do not rub it with sharp objects, bend it or apply excessive force.
・Do not leave drinks or cooked food in copperware for long periods as this can cause verdigris (copper rust) to form. Although verdigris is harmless to the human body, it may affect the taste or appearance of the food.
・Copper has a very high thermal conductivity, making hot objects feel hotter and cold objects feel colder. Be careful not to get burned.
・If oils from fingers or lips or salts remain on the copper and cause oxidation, it may develop a metallic odour or verdigris. After use, wash with a soft sponge and liquid neutral detergent, rinse thoroughly with warm water to remove oils and dry completely before storing. Scrubbing with baking soda will effectively remove verdigris and oils, neutralising the surface and helping to maintain its shine.
・If you have or suspect you have a metal allergy, please do not use copperware.
・Over time, tinned surfaces can darken and copper surfaces can gradually change colour and texture. This natural aging process has been appreciated since antiquity as the development of a unique "scenery". Please enjoy the characteristic changes of copperware as it matures with age.
Daily Care