Provided is a container with an opening blade that is easy to maintain an open state of a tap after the tap is formed by the opening blade. A container body 2 having a mouth 2 a, a sheet-like member 3 for sealing the mouth 2 a, an opening member 4 disposed outside the sheet-like member 3 and having an opening blade 9 and a locking piece 10, And a cap 5 having a push-in piece 13 and a protruding piece 14. The cap 5 can form a drinking port 17 by opening the sheet-like member 3 by the opening blade 9 which is pushed by the push-in piece 13 and turned inside by a push-in operation to the push-in piece 13, Further, the cap 5 can form a fitting port 18 into which the locking piece 10 rotated to the outside in conjunction with the opening blade 9 is...

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