| 摘要 |
A container includes a closed end, several first ring-shaped parts, and several second-ring-shaped parts adjoining the first ring-shaped parts; each of the first ring-shaped parts has a vertical annular side while each of the second ring-shaped parts has a sloping annular side; when the container is stretched, the ring-shaped parts will be one on top of another to comprise a substantially cone-shaped vessel, which can be pressed into a flattened shape with smaller ones of the ring-shaped parts being relocated within adjacent larger ring-shaped parts; the second ring-shaped parts are formed in such a manner that an angle between each of the second ring-shaped parts and a horizontal line is 60 to 80 degrees; thus, the container is more similar to a cylinder to have a large volume; therefore, the container can be pressed to become flat so as to occupy less space, thus being easy to carry and transport.
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