We advise you to brush your teeth in the sink and not in the shower. Nevertheless, our vitamin gel consists of 100% plant-based raw materials, with the exception of the aromatic fragrance. Aromatic fragrance is a by-product used in skin care blends. Because only a minimal amount is mixed with water, it will not cause any problems even if a small amount is swallowed. notice: Do not sip filtered water often or in large quantities.  Unfortunately, sink faucet sizes are not an international standard, so we don't have a filter specifically for sinks yet. But don't worry, we plan to address every faucet at some point. Sign up for our newsletter at the bottom of this page and be the first to know!