Anti-sloshing liquid-retaining bottles

An anti-sloshing bottle, comprising:

• an outer shell defining a liquid retention compartment configured for storing non-carbonated liquid;
• a high-pressure reservoir defining an air retention compartment configured to maintain a pressure of less than or equal to 100 psi;
• a bladder fluidically coupled to a reduced pressure compartment, wherein the bladder is disposed within the outer shell, such that the bladder is configured to expand and contract within the outer shell in response to changes in pressure generated by the reduced pressure compartment;
• a purge button configured to close and open a release valve configured to vent the bladder to an atmosphere external to the outer shell;
• a pressure regulator assembly comprising a regulator housed between the reduced pressure compartment and an air retention compartment,
• wherein the regulator is configured to maintain a pressure differential between the reduced pressure compartment and the air retention compartment such that the pressure differential in the reduced pressure compartments is less than the pressure in the air retention compartment, and
• wherein the pressure in the air retention compartment is sufficient to expand or contract the bladder against the stored non-carbonated liquid;
• and
• a mouthpiece configured to expel the non-carbonated liquid using pressure generated by the force of the bladder against the non-carbonated liquid stored in the liquid retention compartment formed by surfaces comprising the outer shell and the bladder.