A liquid container having a memory for storing data. The memory includes a rewritable region from which the data is readable and in which the data is rewritable, and a read only region from which the data is readable and in which the data is unwritable. A first circuit overwrites the data and reads the data from the rewritable region, and a second circuit reads the data from the read only region. A first antenna is connected with the first circuit, and a second antenna is connected with the second circuit. A protecting member protects the first antenna during transportation of the liquid container and exposes the first antenna and the second antenna in use.