Ideally, you ought to wash or rinse out your travel mugs straight right after use, to circumvent any grimy build-up inside. If you want to take out odors, just one tip is to include ½ cup of vinegar in advance of introducing 1tbsp baking soda into your travel mug. ) https://zionfscsx.dbblog.net/5633264/the-2-minute-rule-for-travel-souvenir-tea-mugs