Cover, and beverage container comprising same

A lid body that is to be attached to a beverage container main body having a cylindrical edge portion that defines an opening, the lid body comprising:

• a lid main body that is detachably fixed to the cylindrical edge portion of the opening to cover the opening and that includes an inner surface that faces an inner portion of the beverage container main body, and a circumferential edge portion that defines a spout for pouring a beverage contained in the beverage container main body;
• a ring-shaped first seal portion that is formed so as to be undetachable from the inner surface, and is configured to seal a gap located between the cylindrical edge portion of the opening and the lid main body by being in tight contact with the cylindrical edge portion of the opening;
• a second seal portion that is formed integrally with the first seal portion and formed using a material that is the same as a material of the first seal portion, and is formed so as to be undetachable from the circumferential edge portion of the spout;
• and
• a plug that is disposed to be movable between a closing position for sealing the spout by being in tight contact with the second seal portion and an opening position for bringing the inside and the outside of the beverage container main body into communication with each other via the spout, wherein
• the spout is defined at a position away from the center of the opening, and
• the second seal portion extends inward in the radial direction from the first seal portion and is at a position away from the center of the first seal portion.