Systems and methods for bottle apparatuses, container assemblies, and dispensing apparatuses

A portable bottle apparatus comprising:

• a bottle portion defining an internal volume for containing a consumable liquid;
• a flexible pouch for containing additive, the flexible pouch positioned at least partially within the internal volume;
• a sensor configured to sense a pressure of the internal volume;
• and
• a processor configured to obtain the sensed pressure and determine a volume of liquid in the flexible pouch based at least in part on the sensed pressure.

A portable bottle apparatus comprising:

• a bottle portion for containing a consumable liquid;
• a flexible pouch for containing additive, the flexible pouch coupled to the bottle portion;
• a sensor configured to sense a value indicative of a pressure in the flexible pouch;
• and
• a processor configured to determine a volume of liquid in the flexible pouch based at least in part on the value.

A method for determining a quantity of additive for use with a portable bottle apparatus, the method comprising:

• providing a flexible pouch for containing additive positioned at least partially within an internal volume of a bottle for containing liquid;
• sensing a pressure of the internal volume;
• and
• determining a volume of liquid in the flexible pouch based at least in part on the sensed pressure.

A method for determining a quantity of additive for use with a portable bottle apparatus, the method comprising:

• providing a flexible pouch for containing a volume of additive attached to a bottle for containing liquid;
• sensing a value indicative of a pressure of the flexible pouch;
• and
• determining a volume of the liquid in the flexible pouch based at least in part on the sensed value.