| 摘要 |
A double cup is provided to smoothly flow contents of the cup by tilting the cup using an inner cup having a gradually decreased diameter in a downward direction. The double cup includes an upper surface(31) of an outer cup(24) formed in a diameter approximately similar to that of a lower surface(32) the outer cup, an inner cup(22) formed in a gradually decreased diameter in a downward direction, an end portion(24) of the inner cup positioned at a specified height from the lower surface of the cup. A shape of the outer cup is different from that of the inner cup each other. |
