A device prepares drinking water by electrolysis, belonging to the technical field of equipment for electrolysis of water. The device includes a water container, at least one pair of a cathode and an anode arranged within the water container, and an electrolysis power source used for supplying electricity to the cathode and the anode; a water-permeable membrane is arranged between the coupled cathode and anode, and the water-permeable membrane covers the anode, the range of the distance between the water-permeable membrane and the cathode being 010 mm. The device, when electrolyzing water, can prepare water which has a low oxidation reduction potential, is rich in hydrogen and has a certain sterilization capability and is suitable for drinking.

An on-demand filter structure including a first hydrophilic protective layer comprising a first surface exposable to a stream of water. A contact area on the first surface receives the stream. The first hydrophilic protective layer receives the stream and distributes water out a second surface, primarily using gravity. An activated carbon felt (ACF) layer is adjacent to the second surface, wherein the ACF layer is configured for water filtration, primarily using gravity. A second hydrophilic protective layer includes a third surface adjacent the ACF layer and a fourth surface. The third surface receives filtered water from the ACF layer, and the fourth surface expels the filtered water primarily using gravity, wherein the first and second hydrophilic protective layers sandwich the ACF layer. A cross section of the first hydrophilic protective layer, the ACF layer, and the second hydrophilic protective layer has a curvature.

A method of forming a hybrid, hand-held drinking bottle includes connecting a top element to a bottom element to form a seam therebetween. The top element includes a top wall extending around a top axis, and a top opening extending within the top element between opposed ends of the top wall. The top element is formed from a material that is of a first hardness. The bottom element comprises an end wall, a bottom wall extending around a bottom axis, and a bottom opening extending between the end wall and an opposing end of the bottom wall. The bottom element is formed from a material that is of a second hardness less than the first hardness. The top opening is in communication with the bottom opening when the top element is connected to the bottom element. The method further includes over molding a collar around the seam.

A fast acting water purification system containing a source of silver ions which is suitable for use in personal or household water containers, where the non-potable water may contain halides or other materials that limit the solubility of silver in the non-potable water, with the purification agent including a source of silver ions and a compound containing a hydantoin ring increase the presence of silver ions in the non-potable water to a level sufficient to quickly kill harmful microorganisms in the non-potable water without the need to add additional biocides to the non-potable water or pretreat the non-potable water.

A water filtration apparatus and a method of using thereof, wherein the water filtration apparatus includes a nanoparticle layer which comprises polypeptide-functionalized nanoparticles that are capable of absorbing heavy metals selected from the group consisting of Pb.sup.2+, As.sup.5+, Cd.sup.2+, Hg.sup.2+, Cr.sup.6+, Cu.sup.2+, and Zn.sup.2+, as well as organic materials. Various embodiments of the water filtration apparatus, the method of using the apparatus, and a method of producing the polypeptide-functionalized nanoparticles are also provided.

A method for a water bottle comprising, coupling a cap to bottle housing such that an interior of the water bottle and the cap form a water-tight region, receiving a button push on the cap, determining with a light sensor whether visible light is present in a vicinity of a UV LED light source disposed within the cap, in response to the push of the button, initiating providing with a UV LED light source UV light to the interior in response to the push of the button and in response to absence of the visible light within the vicinity of the UV LED light source, and inhibiting providing with the UV light to the interior after a period of time after the initiating providing UV light to the interior or in response to determining the visible light being present in the vicinity of the UV LED light source.

Disinfection of a surface, such as a mouthpiece of a water bottle, using ultraviolet radiation is disclosed. A cover assembly can include a cover configured to selectively enclose the surface to be disinfected, such as the mouthpiece. The cover assembly can be configured such that ultraviolet radiation can be emitted into an interior volume at least partially formed by the cover and including the surface. The cover assembly can further include a power source which provides power to one or more ultraviolet light sources that emit the ultraviolet radiation. The cover assembly can be a mouthpiece cover assembly physically separate from a container and top cover or integrated in the top cover. A container and a top cover including one or more features for improved cleanliness are also disclosed.

A hydrogen water and magnetic water generating water bottle simultaneously turns water filled into the water bottle into magnetic water and hydrogen water, enables both the top and bottom of the water bottle to be opened using top and bottom caps, enables the internal cleaning of the water bottle to be cleanly carried out, and enables the easy exchange of a magnetic water generating means and a hydrogen water generating means. The water bottle includes top and bottom opening parts. Magnetic water generating means is detachably provided to penetrate the top opening part, is disposed in the top of an inner part of the water bottle, and discharges upwardly the water filled into the water bottle. Hydrogen water generating means is detachably provided to penetrate the bottom opening part and is disposed in the bottom of the inner part.

A portable water purifier according to the present invention includes: a container that is open at least at the top and has a predetermined internal volume; a cap that is coupled to the top of the container to seal the container and has an exit for selectively communicating with the container; a pump that is embedded in a side of the container and supplies air in a predetermined direction into the container; and a filter assembly that is coupled to the bottom of the cap and inserted in the container to filter water. According to the present invention, it is possible to simply supply purified water using pressure from the pump embedded in a side of the container to supply air into the container in a predetermined direction.

Embodiments of the invention include a vessel having an opening and a detachable cover for covering the opening. The cover includes a semiconductor device with an active layer disposed between an n-type region and a p-type region. The active layer emits radiation having a peak wavelength in a UV range. The cover also includes a sensor for detecting whether the cover is covering the opening.