A personal, portable drinking container has a bottle with a side wall, a closed bottom, a neck, a reservoir, and a top opening in the neck providing access to the reservoir. A cap is removably fitted on the neck to close the top opening. The bottle can have an annular formation in the side wall below the neck to prevent the neck from deforming when the bottle is squeezed. The side wall can have a pair of squeezable sides and a pair of opposed stiff sides below the annular formation, whereby the stiff sides help the bottle to rebound quickly after each squeeze.

The present invention provides methods and apparatus for cleaning and sanitizing potable water devices/appliances by recirculating and pulsing a rejuvenation solution through the device/appliance using a portable apparatus comprising a mechanical pump fluidly connected to the device/appliance.

A portable drinking water filter system, such as a pitcher, having a floatable body including a filter opening configured to receive a water filter, the floatable body having a seal extending outward from an outer surface of the floatable body. The floatable body is disposed in a container cavity such that a body seal engages the sidewall and restricts water from passing between the floatable body and the sidewall. The seal is configured to create friction with the sidewall, wherein the friction created when the floatable body rises in the container is different than when the floatable body lowers in the container. The friction created when the floatable body rises in the container is greater than when the floatable body lowers in the container, allowing the floatable body to auto-retract toward a cavity base without burping.

A system and a method comprise an upstream chamber is configured to receive a variable input flow of a wastewater mixture having a maximum input flow rate. A downstream chamber is adjacent to the upstream chamber. An effluent baffle wall separates the downstream chamber from the upstream chamber. An effluent flow port is located in the effluent baffle wall. The effluent flow port comprises a first orifice configured to produce a first modulated flow of the wastewater mixture from the upstream chamber to the downstream chamber, and a second orifice being positioned above the first orifice. The second orifice is configured to produce a second modulated flow having a second flow rate, wherein a combined flow rate including the first and second flow rates is less than the maximum input flow rate.