Vacuum Insulated Mugs & Bottles - FAQ

The black dots or brown discoloration are mold, which is very difficult to remove. In this case, we recommend replacing the part. Replacement parts may be ordered from our online. Please check the model number at the bottom of the bottle to ensure that a correct part is purchased.

Please ensure that after cleaning the gaskets they are allowed to air dry completely to prevent mold from developing.

It is not recommended to fill the vacuum mug with any type of beverage containing dairy or carbonated drinks. Filling the vacuum mug with dairy can cause curdling and leave residual odors.

Yes, all of our mugs or bottles with a nonstick coated interior are PFOA-free.

Most of Zojirushi’s vacuum insulated mugs or bottles and all their components are not dishwasher safe. Only selected models are dishwasher safe. These are indicated in the features section.

We recommend handwashing them with a mild dishwashing liquid and a soft sponge and then letting them fully dry before their next use. For detailed instructions on how to care for your Zojirushi vacuum insulated mug or bottle, please refer to your instruction manual.

Replacement parts may be ordered from our online page. Please check the model number at the bottom of the bottle to ensure that a correct part is purchased.

Preheat or precool your vacuum bottle by filling it with hot or cold water, attach the stopper, and let stand for at least five minutes. Empty the water and fill it with the desired beverage. Cool bottles are for filling cold beverages only.

Always rinse out your vacuum bottle after each use and rinse the stopper under running water. Do not soak the vacuum bottle in water or place it in a dishwasher to clean. The exterior, stopper, and cup(s) can be cleaned using a moist sponge or soft cloth and mild dishwashing liquid. The interior can be cleaned using a mild dishwashing liquid and then rinsed thoroughly. Please refer to your instruction manual for more.

Please ensure all the rubber gaskets are installed correctly. If all parts are in place, then the leaking may be caused by liquid that is trapped inside the spout, or moisture remaining in the cup or cup/cap. To alleviate this, allow liquid to completely drain back into the bottle after pouring and before closing the spout. Close the spout and shake the bottle to expel any excess liquid that may still be in the spout. Wipe away moisture from the cup or cup/cap before closing. Be sure to unscrew the stopper and rinse under running water after each use.

Zojirushi SlickSteel® Finish is an alternative to our nonstick coating. They are non-coated on the inside and instead use an electrically charged polishing process to treat and finish the interior. The result is a corrosion resistant surface that repels foreign substances and stains, creating a smooth and ultra-clean stainless steel environment for your drinks.

The interior of all our vacuum bottles is made of high-quality stainless steel and is BPA-free. Stoppers, mouth rings, and all other plastic parts are also BPA-free.