Rigid articles having a well-defined corner

A rigid blow molded article comprising:

• sides of the article forming at least one corner wherein the corner is characterized by mathematically fitting a sphere of best fit into the corner so there is a circular arc section in the at least one corner, wherein a radius of curvature of the sphere of best fit is less than 5.7 mm;
• and
• the sides forming the corner comprises at least an outer layer of an outer layer material having an elastic modulus (E′) less than about 370 MPa measured by dynamical mechanical analysis per ASTM D4065, with a frequency sweep conducted at the fixed temperature of the cold-crystallization peak temperature (“Tcc”) of the outer layer material minus 15° C. (Tcc−15° C. temperature) at 1 Hz, wherein the Tcc is measured by way of differential scanning calorimetry (“DSC”) at a temperature ramp rate of 10° C. per minute.

A rigid blow molded article comprising:

• sides of the article forming at least one corner wherein the corner is characterized by mathematically fitting a sphere of best fit into the corner so there is a circular arc section in the at least one corner, wherein a radius of curvature of the sphere of best fit is less than 5.7 mm;
• and
• the sides forming the corner comprises at least an outer layer of an outer layer material having an elastic modulus (E′) less than about 370 MPa and a cold-crystallization peak temperature from about 120° C. to about 150° C. with a frequency sweep conducted at the fixed temperature of the cold-crystallization peak temperature of the outer layer material minus 15° C. (Tcc−15° C. temperature) at 1 Hz, wherein the Tcc is measured by way of differential scanning calorimetry (“DSC”) at a temperature ramp rate of 10° C. per minute.