Collapsible container

A collapsible container including:

• an inner cup including an inner cup edge and an inner cup body, wherein the inner cup body is made of a soft waterproof material, and the inner cup body includes an inner cup wall and an inner cup bottom;
• and
• an outer cup including an outer cup edge and an outer cup body, wherein the outer cup body has an adjustable height, the inner cup body is allowed to be placed in the outer cup body, the outer cup body includes an outer cup bottom, wherein the outer cup body further includes:
• a first cup ring formed at its lower end with at least one first lower coupling structure;
• at least one second cup ring formed at its upper end and lower end with at least one second upper coupling structure and at least one second lower coupling structure respectively;
• and
• a third cup ring formed at its upper end with at least one third upper coupling structure;
• wherein the outer cup bottom is fixed to a lower end of the third cup ring to form a cavity, and the first cup ring, the second cup ring and the third cup ring are serially connected together in a manner that, the inner cup edge is detachably attached to the first cup ring, and the inner cup is detachably mounted in the outer cup;
• wherein when the outer cup body is being highly extended, the first cup ring is allowed to move away from the second cup ring to make the first lower coupling structure engaged with the second upper coupling structure so as to interlock the first cup ring and the second cup ring, or the second cup ring is allowed to move away from the third cup ring to make the second lower coupling structure engaged with the third upper coupling structure so as to interlock the second cup ring and the third cup ring, such that the outer cup body is held in a highly extended status;
• the first cup ring is allowed to move towards the second cup ring to disengage the first lower coupling structure from the second upper coupling structure so as to unlock the first cup ring and the second cup ring, or the second cup ring is allowed to move towards the third cup ring to disengage the second lower coupling structure from the third upper coupling structure so as to unlock the second cup ring and the third cup ring, such that the outer cup body is released from the highly extended status;
• and wherein,
• the first lower coupling structure includes a first lower guiding portion and a first lower limiting portion, which are formed on an inner wall at the lower end of the first cup ring;
• the second upper coupling structure includes a second upper guiding portion and a second upper limiting portion, which are formed on an outer wall at the upper end of the second cup ring, wherein the first lower guiding portion matches the second upper guiding portion, for guiding the first cup ring to move towards the second cup ring, and the first lower limiting portion matches the second upper limiting portion, for limiting a maximum distance that the first cup ring is movable away from the second cup ring in order to prevent separation between the first cup ring and the second cup ring;
• and
• the second lower coupling structure includes a second lower guiding portion and a second lower limiting portion, which are formed on an inner wall at the lower end of the second cup ring;
• the third upper coupling structure includes a third upper guiding portion and a third upper limiting portion, which are formed on an outer wall at the upper end of the third cup ring, wherein the second lower guiding portion matches the third upper guiding portion, for guiding the second cup ring to move towards the third cup ring, and the second lower limiting portion matches the third upper limiting portion, for limiting a maximum distance that the second cup ring is movable away from the third cup ring in order to prevent separation between the second cup ring and the third cup ring.