Bottle cap having anti-counterfeit function and bottle using the same

A bottle disposing a bottle cap having anti-counterfeit function comprising:

• a bottle body;
• and
• a bottle cap having anti-counterfeit function comprising:
• a cap body disposed at the bottle body and having a cap portion, a ring neck portion and at least one joint portion, wherein there is an interval between the cap portion and the ring neck portion, the joint portion crosses through the interval and couples the cap portion and the ring neck portion;
• and
• an RFID tag disposed at the cap body and having an antenna and a chip electrically connected with the antenna, wherein the antenna has a first antenna portion, a second antenna portion and a third antenna portion connecting with the first antenna portion and the second antenna portion, the first antenna portion and the chip are disposed at the cap portion of the cap body, the second antenna portion is disposed at the ring neck portion of the cap body, the third antenna portion crosses through the interval and bridge connects the first antenna portion and the second antenna portion.