Abstract: A toothbrush having a substantially vertical orientation while at rest on a supporting surface, including a body having one end provided with a tooth-brushing element and another opposite end, said body having at least a part configured so that when the toothbrush is inclined, even close to a horizontal position, the toothbrush automatically self erects to the substantially vertical orientation to prevent a contact of said tooth-brushing element with the supporting surface.

Abstract: A toothbrush having a substantially vertical orientation while at rest on a supporting surface, including a body having one end provided with a tooth-brushing element and another opposite end, said body having at least a part configured so that when the toothbrush is inclined, even close to a horizontal position, the toothbrush automatically self erects to the substantially vertical orientation to prevent a contact of said tooth-brushing element with the supporting surface.

Abstract: A toothbrush has a body having one end provided with a toothbrushing element and another opposite end, the body also having at least a part formed so that when the toothbrush is inclined, even close to a horizontal position, it automatically turns back to a substantially vertical orientation to prevent a contact of the toothbrushing element with a supporting surface.

Abstract: A toothbrush has a body having one end provided with a toothbrushing element and another opposite end, the body also having at least a part formed so that when the toothbrush is inclined, even close to a horizontal position, it automatically turns back to a substantially vertical orientation to prevent a contact of the toothbrushing element with a supporting surface.

Abstract: A mobile device may present advertisements to users. However, advertisements may be ineffective or dangerous if presented when the attention of the user is unavailable (e.g., while operating a vehicle at a busy intersection.) It may also be desirable to select a sequence of advertisements that interrelate, or that relate the route of the user to an advertised product or service. Therefore, potential routes may be identified (e.g., based on user history or nearby locations of interest), and for potential routes, advertisement opportunities may be identified where the user may have an at least partial attention availability (e.g., traffic signals and fuel stops.) Advertisements may be selected for presentation at the advertisement opportunities of respective potential routes. Additionally, advertisement opportunities may be offered to advertisers in an auction model, and advertisers may specify conditions of advertisements (e.g.