Abstract: A cap assembly for a cultivation bottle for growing mushrooms is provided. The cap assembly (10) includes a bottle fitting member (20) configured to fit onto a mouth part (54) of the cultivation bottle (50) and a bowl-shaped member (30) configured to be placed on the bottle fitting member. The cap assembly being connected to the bottle prior to fruiting such that the mushrooms grow up through the mouth of the bottle and the attached cap assembly. The bowl-shaped member being separable from the bottle and attached bottle fitting member to facilitate harvesting of the mushroom fruiting bodies and removal of a section of the elongated hard tip portion.

Abstract: A cap (10) for a cultivation bottle for brown beech mushrooms includes a cylindrical member (20) that is fitted onto a wide-mouth part (54) of a cultivation bottle (50). The cylindrical member (20) includes a large-diameter cylindrical part (22) that covers and is fitted to an end edge of the wide-mouth part (54) and an outer surface in a vicinity of the end edge, a small-diameter cylindrical part (24) that has a first opening (21) with a smaller diameter than the large-diameter cylindrical part (22), and that is positioned toward a center of the large-diameter cylindrical part (22), and a connecting part (25) that connects an outer peripheral edge of the large-diameter cylindrical part (22) with the small-diameter cylindrical part (24). A height of an inner surface (15) of the small-diameter cylindrical part (24) is from 6 mm to 30 mm.