4 ms·

Same about waviness on plastic bottles. https://www.riverkeeper.org/wp-content/uploads/2018/04/bottled-water-credit-CC-Myrtle-Beach-TheDigitel-viaFlickr-modifi

• rvba 3y ago
  The waviness around makes it easier to hold them too. Although to some degree it might be marketing as well?
  • 3cats-in-a-coat 3y ago
    It's a combination of structural variation, like with the bricks, and branding. Because as long as it's "waving" it doesn't matter how exactly it waves except in some critical areas, like where you hold it, the bottom and the top.