keeping / cooking / decorating
Glass Jar
Koizumi Glass Works
TAITO, Tokyo, Japan
  • heat-resistant borosilicate glass, stainless steel
  • Φ165mm H223mm 2000ml
the product:
Glass jar with a stainless steel hanging handle and glass lid. Each piece is carefully blown and manufactured using the skills of glass craftsmen. Borosilicate glass is often used in physical and chemical glass because of its thermal shock resistance, which prevents cracking even when the temperature changes from 0°C to 120°C all at once, and its high chemical resistance against acids and alkalis. It can also be boiled, and its removable hanging handle makes it easy to wash every corner of the glass and is hygienic. There are four types in total: with and without a scale, and with and without a glass lid.

Made of functional borosilicate glass, the glass jars have a lean shape and can be used practically for any occasion in life. Ideal for storing food as there is no odor transfer and it is just the right size to hold 2 kg of rice. As it is wide, it is easy to take out a measuring cup even if you put your hand deep into the jar.
It is also acid-resistant and it is ideal to keep pickles, lemon confiture, and pickled plums. Moreover, the spout makes it easy to use.The lid cannot be sealed, but can be used as a dust cover.
It can be used for storing daily necessities, arranging large flowers, or as a wine cooler filled with ice. The hanging handles make it easy to carry.

Even if the glass jar or the glass lid is broken, you can purchase those parts individually.
When washing, use a soft sponge, brush, or scrubber. Use of metal scrubbers, abrasive sponges, or coarse-particle cleansers may scratch the glass.
Not for use on open flames, ovens, microwave ovens, hot plates, gas stoves, ceramic stoves, or induction stoves. When pouring boiling water, please use mittens or other protective clothing as the jar will become hot.

※The photo shows a glass jar without a scale
※Made to order
the maker:
Founded in 1912 in Minowa, Taito-ku, Tokyo. The company begins manufacturing and selling volumetric measuring glass for physical and chemical medical use and for precise weighing.
Koizumi Glass Manufacturing is one of the few Japanese manufacturers that can melt borosilicate glass in-house. The company takes advantage of its strength in small-lot production by tailoring its manufacturing to the needs of various fields, including physical and chemical glass. It is also actively engaged in product development, such as the production of their original coffee flannel dripper in 2000, and aim to create products that can be used for a long time without getting tired of them, whether they are new products or the same old products that they have been manufacturing for a long time.
Koizumi Glass Manufacturing is dedicated to manufacturing glass products, with a focus on Japan-made products. The founder, Shigezo Koizumi, was awarded the Order of the Rising Sun, Gold and Silver Rays for his distinguished service to the glass industry.

Borosilicate glass, also known as heat-resistant glass or hard glass, is widely used in scientific and chemical equipments, lighting fixtures, kitchenware, and other products because of its excellent chemical resistance. In addition to borosilicate glass, there are other types of glass around us that are similarly transparent but have different characteristics, such as soda glass, which can be mass-produced as sheet glass and cups, and crystal glass, which is highly transparent and used for high-end tableware, chandeliers, and other decorative items. Koizumi Glass Manufacturing introduces the unique features and charms of "borosilicate glass" on its website and SNS, offering ideas on how to use borosilicate glass in your daily life.

Elaborate scientific and chemical glass, which is difficult to process, is not an easy item to make even for skilled craftsmen. The out-of-spec products that inevitably come out are melted down to reused as glass materials.
During that time, with a female employee’s idea, who thought it would be a waste to destroy usable items, the company started to hold a public garage sales 10 years ago. With this garage sale, the scientific and chemical supplies previously used by specialists became more accessible to the public. The bubbles in the products and the streaks of rolled glass are very popular as a taste of hand-blown glass.