| 摘要 |
PROBLEM TO BE SOLVED: To provide a container which can check whether or not a lid is unsealed by using as small amount of material as possible without applying any heat into the container. SOLUTION: In the container 11 comprising a container mouth 12 with a male screw 13 formed on an outer circumferential surface thereof and the lid 14 with a female screw screwed in the container mouth 12 formed on an inner circumferential surface thereof, a container side projection 16 is provided in a screw groove along a screw terminating end 20 of the male screw 13, a lid side projection engaged with the container side projection 16 is provided in a screw starting end of the female screw, a cut-off part 24 including the lid side projection is provided on a side of the lid 14 in a separable manner, the container side projection 16 and the lid side projection ride over each other in the screwing direction, and engaged with each other in the unscrewing direction so as to be less easily unscrewed.
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