![What is this concave circle on the side of my milk jug? There's only one, there isn't an opposite shape on the other side.. : r/whatisthisthing What is this concave circle on the side of my milk jug? There's only one, there isn't an opposite shape on the other side.. : r/whatisthisthing](https://preview.redd.it/68vlrosn8nb21.jpg?width=640&crop=smart&auto=webp&s=65c1a871a2121a24220e281638d2106f66c7b95d)
What is this concave circle on the side of my milk jug? There's only one, there isn't an opposite shape on the other side.. : r/whatisthisthing
![Poor Design: Costco's Milk Container | by Samuel Hassel | Product Design Fundamentals: Design for Interactions for Products | Medium Poor Design: Costco's Milk Container | by Samuel Hassel | Product Design Fundamentals: Design for Interactions for Products | Medium](https://cdn-images-1.medium.com/max/721/1*fQi5o9bTaR2uup7t0Z0Hmg.jpeg)
Poor Design: Costco's Milk Container | by Samuel Hassel | Product Design Fundamentals: Design for Interactions for Products | Medium
![Lightweight milk jug uses less plastic | 2014-12-05 | Food and Beverage Packaging | Packaging Strategies Lightweight milk jug uses less plastic | 2014-12-05 | Food and Beverage Packaging | Packaging Strategies](https://www.packagingstrategies.com/ext/resources/2014-Postings/New-Packages-2/MOD-289542_MAM_milkcarton-web.jpg?1417807816)