A company called Graphic Packaging International has developed KeelClip, a paperboard-based carrier for six-packs of cans. Meant to replace plastic rings and shrink wrap, it's recyclable, provides a little extra room for graphics, and "offers consumers enhanced hygiene, as the can tops are protected."
One Coca-Cola bottler, Liberty Coca-Cola Beverages, has transitioned their 7.5-oz min cans to the new format. Coke drinkers in the New York, New Jersey, Connecticut, Philadelphia and Delaware markets will soon see the new packaging. Liberty says the KeelClip changeover "will remove 75,000 pounds of plastic packaging per year from the supply chain for approximately 3.1 million cases."
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This is already a practical proven design. Dutch beer manufacturer Grolsch has been using this since 2020. I think moist is a minor issue; cardboard is already used extensively in logistics :o)
https://www.foodclicks.nl/nieuws/grolsch-komt-met-kartonnen-blikverpakking-voor-de-sixpack/
While I'm all for this, I would be afraid that moisture in the storage or transportation process could ruin a whole truckload, whereas that's not a problem for plastic. In any case, I hope this works.
Having had a condensation soaked cardboard carrier fail on me literally walking out of the store I bought it in, I can't imagine this being any stronger.
I wonder why the...keel?...sits so far down between the cans. Since at least a talking point of most plastic over paper arguments is the difference in transportation weight, it seems that a shorter keel should give significant weight savings at scale.
Also seems like the top layer could be punched, to reduce weight and provide a recess that would stabilize stacks of packaged cans.
I'll be on the hunt for this packaging in my local store- curious to see how easy it is to reinsert cans if they come out, compared to the plastic rings.
I suspect the keel height is designed to provide rigidity in the long direction of the pack. Bending in that direction could lead to the cans falling out of their spots