I have bought a vacuum stainless steel mug. I use it for my coffee. after washing it, the coffee smell is still there. so i closed it and leave it for a few weeks. after that, the coffee smell still there.

Anyone can help to explain is it natural or chemical reaction?

try using liquid bleach diluted with some water and soak overnight... then soak & flush with plenty of water to get rid of the bleach smell, followed by washing with mama lemon.

Buy a baking soda.

Put hot water and few tablespoon of baking soda. Leave it over night.

I have bought a vacuum stainless steel mug. I use it for my coffee. after washing it, the coffee smell is still there. so i closed it and leave it for a few weeks. after that, the coffee smell still there.

Anyone can help to explain is it natural or chemical reaction?

Either your mug or coffee no horse run lah. They make love there.

Edited September 29, 201016 yr by bepgof