A pitcher can look perfectly serviceable until it is filled to a marked line and poured into a narrow container. Then the stream continues after the operator has stopped, the target is missed, and a small error becomes part of every batch.
Well-designed custom plastic pitchers start with the work they must perform, not with appearance alone.
Define the liquid volume, expected pour rate, handling position, use frequency, and acceptable measurement variation. A vessel used for quick transfers needs different proportions from one used to portion ingredients or dispense a measured amount throughout a shift.