A cup-type container obtained by compression-forming a
thermoplastic resin and including at least a
flange portion, a body portion and a bottom portion, wherein a ratio (L / D) of the height of the container to the
diameter of the opening is not less than 1.0, and if the direction of height of a test piece
cut out from the body portion of the container is denoted by x and the circumferential direction thereof by y, a half-value width P at a half peak of a
Miller index at a
diffraction angle 2θ=14.5° that represents the
diffraction by the
crystal plane (110), is in a range of 1.25 to 1.5 over the
whole body portion in a
peak intensity profile in the direction of height (x-direction) of a
Debye's ring obtained by measuring the
diffraction intensities by causing the X-rays to be incident on an x-y plane of the test piece at right angles thereto. The cup-type container is evenly oriented in the direction of height of the container and in the circumferential direction thereof, has an even strength in all directions and has excellent
heat resistance. The invention, further, provides a method of forming the cup-type container.