Zojirushi warns against certain drinks in vacuum flasks

Khaosod•International•2d ago

Reader Briefing

Zojirushi warns that certain beverages can cause corrosion and rust in vacuum flasks.

•Zojirushi advises against storing milk, fruit juice, carbonated drinks, or high-salt soups in vacuum flasks for long periods.
•Improper use can cause internal rust, damage internal parts, and reduce temperature retention efficiency.
•The company provided four correct cleaning methods and specific advice on using citric acid for rust and odors.
•The warning was issued on August 5, 2026.

•On August 5, 2026, Zojirushi issued a warning regarding the use of vacuum flasks.
•Zojirushi states that vacuum flasks are suitable for water, tea, and coffee, but not for milk, fruit juice, carbonated drinks, or high-salt soups like miso soup.
•Storing these prohibited beverages for long periods may cause internal rust and damage internal parts.
•Improper liquid storage can reduce the efficiency of the vacuum flask in maintaining both hot and cold temperatures.
•Zojirushi advises avoiding steel wool, scouring pads, or coarse sponges to prevent scratching the internal coating.
•Zojirushi cautions against using dishwashers unless specified, as heat and water pressure may peel external paint or deform the flask.
•Zojirushi recommends a four-step cleaning process: immediate rinsing, separating the lid and seal, using mild dish soap with a soft sponge, and air drying.
•Zojirushi suggests mixing 1 teaspoon of citric acid with 500 ml of warm water and soaking for 3 hours to remove rust or odors.

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Zojirushi(Zojirushi (โซจิรูชิ))ℹ️

A famous vacuum flask manufacturer from Japan.