Liquid bottle including valve that is configured to contact lip of rubber and that has protruding portion configured to be located inward of the lip of rubber

A liquid bottle comprising:

• a body having an internal space, the body having an opening allowing the internal space to communicate with an outside of the body through the opening;
• a rubber positioned at the opening of the body, the rubber having a first lip extending into the internal space around the opening;
• a valve configured to contact the first lip;
• and
• a resilient member urging the valve toward the rubber,
• wherein the first lip has an annular shape having a first length in a first direction and a second length in a second direction orthogonal to the first direction, the first length being longer than the second length, and
• wherein the valve has a flat portion and a protruding portion, the flat portion opposing the first lip in an urging direction of the resilient member, the protruding portion protruding from the flat portion and being configured to be located inward of the first lip.