1. This blue tab on a toothbrush indicates that how long we can use this toothbrush.
2. The blue tab will fade away becoming a white tab then you know that it is time to change to a new toothbrush.
3. ได้นะคะ หรือ Thank you for your moral support. // Thank you for being supportive.
4. Can you tell me what do the shoes you are looking for look like?