• We are thinking of putting a scale sticker on the clear tubes. The scale sticker will show the numbers in centimetres. The numbers such as 3, 5 and 11 (cm) will indicate that the amount of powders required for the specific consistency, Ketchup, Mayonnaise and Peanut Butter. The transparent scale allows easy measurement of the volume.
• The inside diameter of the clear PVC tube is 3.4 cm. 
• We use the numbers from the table (previous post), and then we have calculated the volume of the powders we need for each consistency. This volume will be used when defining the heights. 
• http://image.made-in-china.com/4f0j00VehaBvEMZPks/100ml-Syringe-Luer-Lock.jpg