Is Iron Flask dishwasher safe?
Sometimes — with care
Iron Flask is generally not recommended for the dishwasher.
Why
Iron Flask bottles are made of stainless steel with a powder-coated exterior. The high heat and harsh detergents in dishwashers can damage the powder coating, causing peeling or fading. Additionally, the vacuum insulation may be compromised over time with repeated dishwasher use.
How to wash it
Hand wash with warm soapy water and a soft sponge. Rinse thoroughly and air dry with the cap off to prevent moisture buildup.
Last updated 2026-06-16. General guidance — always check your product’s care label. How we verify.