PURPOSE: To easily open a lid by pushing a bottle lid from upward with an intermediate cap positioned above a bottle mouth to have the intermediate cap fit into the mouth, pushing down an outer lid with respect to the intermediate cap to have a protrusion deformed outside while engaging it with a metal cover, and then deforming a skirt inward to have it engaged with a groove.

CONSTITUTION: A bottle lid 2 with an intermediate cap 21 and an outer lid 31 integrated covers a bottle mouth 11 with the outer lid 31, and with the intermediate cap body 22 positioned above the mouth 11, the outer lid 31 is pushed from upward by a capper. Then the intermediate cap body 22 is fitted into the bottle mouth 11. Then an upper stage recess 37 of the outer lid 31 is pushed by an upper rim of a metallic cover 27 to be pushed outward. A lower stage recess 38 of the outer lid 31 is pushed by the upper rim of the bottle mouth 11 to be pushed outward. Then the lower end of a skirt 33 is deformed inward, the deformed part 39 is engaged with a lower stage groove 13 of the bottle 1, and the bottle lid 2 is fixed to the bottle 1. Thus by rotating the bottle rid clockwise or counterclockwise, uncapping is easily done without breaking the skirt.