Purpose of the Circular Dent on Milk Jugs..

Why choose a circular shape instead of a square or triangle?

Circles handle pressure best. With no sharp corners to concentrate stress, pressure distributes evenly around the edge. That makes the circle perfect for an area designed to flex with temperature changes and handling.

Plus, circles are easy to manufacture consistently. Simple, strong, and efficient.

Other Clever Milk Jug Details

While we’re appreciating smart design, here are a few more things you might not have noticed:

• Handle Hole: Not just for grip—removing plastic here reduces material use.
• Bottom Ridges: Those bumps on the base help the jug sit evenly, even on slightly uneven shelves.
• Cap Colors: Many brands use cap colors to signal fat content (like blue for 2% or red for whole milk).

It’s pretty amazing how much thought goes into something we barely notice.