This mug has a coating of oxidized ink which reveals when the mug is filled with a hot liquid. For a clear understanding attached the video of the product.

This mug has a coating of oxidized ink which reveals when the mug is filled with a hot liquid. For a clear understanding attached the video of the product.

This mug has a coating of oxidized ink which reveals when the mug is filled with a hot liquid. For a clear understanding attached the video of the product.

This mug has a coating of oxidized ink which reveals when the mug is filled with a hot liquid. For a clear understanding attached the video of the product.

This mug has a coating of oxidized ink which reveals when the mug is filled with a hot liquid. For a clear understanding attached the video of the product.

This mug has a coating of oxidized ink which reveals when the mug is filled with a hot liquid. For a clear understanding attached the video of the product.

This mug has a coating of oxidized ink which reveals when the mug is filled with a hot liquid. For a clear understanding attached the video of the product.

This mug has a coating of oxidized ink which reveals when the mug is filled with a hot liquid. For a clear understanding attached the video of the product.

This mug has a coating of oxidized ink which reveals when the mug is filled with a hot liquid. For a clear understanding attached the video of the product.

This mug has a coating of oxidized ink which reveals when the mug is filled with a hot liquid. For a clear understanding attached the video of the product.

This mug has a coating of oxidized ink which reveals when the mug is filled with a hot liquid. For a clear understanding attached the video of the product.

This mug has a coating of oxidized ink which reveals when the mug is filled with a hot liquid. For a clear understanding attached the video of the product.

This mug has a coating of oxidized ink which reveals when the mug is filled with a hot liquid. For a clear understanding attached the video of the product.

This mug has a coating of oxidized ink which reveals when the mug is filled with a hot liquid. For a clear understanding attached the video of the product.

This mug has a coating of oxidized ink which reveals when the mug is filled with a hot liquid. For a clear understanding attached the video of the product.

This mug has a coating of oxidized ink which reveals when the mug is filled with a hot liquid. For a clear understanding attached the video of the product.

This mug has a coating of oxidized ink which reveals when the mug is filled with a hot liquid. For a clear understanding attached the video of the product.

This mug has a coating of oxidized ink which reveals when the mug is filled with a hot liquid. For a clear understanding attached the video of the product.

This mug has a coating of oxidized ink which reveals when the mug is filled with a hot liquid. For a clear understanding attached the video of the product.

This mug has a coating of oxidized ink which reveals when the mug is filled with a hot liquid. For a clear understanding attached the video of the product.