Keep it long, treasure it long.

A delicate expression created by handwork

TSUTSU's thermal bottles are made in Tsubame City, Niigata Prefecture, a town known for its metalworking.The minimal number of parts and surprisingly light weight are the result of many years of craftsmanship and experience.The sharp and delicate appearance of the bottle, which makes the most of the original texture of stainless steel, is appealing.

Simplicity taken to the extreme

The first thing that catches the eye about TSUTSU heat- and cold-retaining bottles is their smooth surface.The stainless steel is made as thin as possible by machine processing, and then polished by hand, one by one, to create a beautiful hairline.The smooth finish, so smooth that you cannot tell the seams, is the result of craftsmen's hands and ears that discern accuracy of 1/100 mm.Even with the advancement of technology, nothing can compare to the flexibility and precision of the human hand and eye.In addition, bottles undergo more than 70 processes before they are completed, from production to inspection, paying attention to even the most minute irregularities that are invisible to the human eye.Furthermore, while sampling inspections are the norm for finished bottles, all products are subjected to performance testing twice before shipping, which shows the strong commitment to quality by the manufacturer.The heat-retaining and cold-retaining effects of the bottle are created by the vacuum layer inside the bottle that keeps the temperature of the drink. TSUTSU is designed with a triple layer of metal containing aluminum, which has excellent heat-retaining effects, and a vacuum layer to further increase heat-retaining and cold-retaining power.Furthermore, the thicker the metal, the more heat it absorbs, so TSUTSU reduces heat absorption and dissipation by making the inner stainless steel as thin as possible, at 0.1 mm or less.This not only keeps the bottle at the perfect drinking temperature even when on the go, but also makes it light enough to be easily carried around.The mouthpiece of the bottle is an important part of the bottle.While many ordinary bottles have complicated mechanisms and are difficult to clean, the simple silicone rubber construction of TSUTSU's heat-retaining and cold-retaining bottles makes them easy to remove and wash in every nook and cranny.The TSUTSU warm/cold bottle is surprisingly lightweight and durable, thanks to the minimal number of parts and extremely thin stainless steel.The material characteristics of stainless steel, which is clean and resistant to adherence to ingredients and colors, are also key to its long-lasting use.The 360ml bottle is large enough to hold an M-size cup of coffee at a café or convenience store, and its slim design makes it easy to fit in an office bag for everyday use. 270ml is the brand's standard size, and it can be used for a small amount of water or a cup of coffee.The 270ml is the brand's standard size, just right for when you need to rehydrate or take a breather, and compact enough to carry around easily.

Skillful Stainless Steel Processing

The origins of metalworking in Tsubame-Sanjo can be traced back to the Edo period.The manufacturing of Japanese nails, which began as a side job for farmers to overcome the flooding of the Shinano River, eventually developed into farming tools, kitchen knives, copperware, and stainless steel products, and the industry has expanded with the times.Today, Tsubame-Sanjo is known as a town of metalworking, with a wide range of metalworking operations ranging from the manufacture of machinery and automobile parts to Western tableware.Founded in 1965 in Tsubame-Sanjo, the TSUTSU brand was developed by SUS Co.The company began by manufacturing metalware using the "spatula drawing" technique by skilled craftsmen, and in 1983 began manufacturing and selling stainless steel vacuum flasks developed in-house.The TSUTSU bottle is the culmination of many years of stainless steel vacuum bottle manufacturing technology.While many companies are moving their vacuum flask and bottle production overseas, TSUTSU is a manufacturer that continues to manufacture high quality products with a focus on Japanese products.