Dual bottle

A dual bottle having a first axis in a length direction of the bottle, the dual bottle comprising:

• a. first and second compartments for respective first and second liquids, each compartment having a first end and a second end, each first end including a mouth member configured to allow intaking into the first and second compartment respectively the first and second liquid, and expressing thereout the first or second liquid;
• b. Each first end wider than the second end so that the dual bottle tapers to facilitate dispensing the first or second liquid;
• c. a cap engaged with each mouth member, each cap configured to allow selecting sealing or unsealing a mouth member and resting on a horizontal surface as a stable basis for the dual bottle while having the first axis vertical to the horizontal surface;
• d. the second end of the first compartment including a tenon having a tenon base and a tenon edge, the tenon protruding outwards of the first compartment, and with the tenon edge wider than the tenon base, forming a trapezoidal insert;
• e. the second end of the second compartment including a mortise having a mortise base and a mortise edge, the mortise protruding inwards the second compartment with a mortise base wider than the mortise edge to form a trapezoidal base;
• f. a joint connecting the second ends of the first and second compartments, the joint including the tenon of the first compartment residing inside the mortise of the second compartment, the joint prohibiting drawing the first and second compartments apart in the direction of the first axis;
• and
• g. a label covering the second ends, such as to prevent drawing the first and second compartments apart in a direction perpendicular to the first axis.