Keep it long, treasure it long.

Attention to detail that is invisible to the naked eye

TSUTSU is a brand of insulated and cold-retaining bottles developed by SUS Corporation. Since its founding in 1965, the company has been honing its skills in Tsubame City, Niigata Prefecture, Japan's leading metal processing town, and has pursued original manufacturing.It started out by manufacturing metalware using the "spatula-drawing" technique by skilled craftsmen, and in 1983 began manufacturing and selling stainless steel thermoses of its own design. In 2003, it succeeded in developing the world's first titanium vacuum double-walled tumbler. TSUTSU is a brand that develops insulated and cold-retaining bottles by bringing together the manufacturing techniques of stainless steel thermoses that have been accumulated over many years.