This document describes a bottle/jar compression tester, also known as a top load tester. It has a deluxe model with variable test speed that can evaluate the load bearing capacity of small cartons, PET bottles, confectionary jars, HDPE pails, bottles and jars. The automatic digital model has a backlit LCD display, digital compression counter, push buttons, and peak hold facility. It has variable and programmable test speeds between 10-100 mm/min and a jog speed of 50 mm/min for faster testing. Models are available with capacities ranging from 10 to 200 kgf and resolutions from 1 to 20 grams.