Disclosed is a toothbrush comprising an optical machine-readable representation of data, such as a barcode. Also disclosed is an oral care implement comprising a surface and a plurality of protrusions extending at least 1 millimeter from the surface, the protrusions at least partially defining an optical machine-readable representation of data, such as a barcode. Also disclosed is a system, comprising: an oral care implement comprising an optical machine-readable representation of data, such as a barcode； and a device comprising a processor and memory storing computer readable instructions for causing the processor to process an image of the optical machine-readable representation of data to extract the data from the image.
