Tag Archives: lid

Someone Finally Gave Aluminum Cans the Resealable Lid They Always Needed

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The aluminum can has been one of the most successful packaging formats in history, but it carries a fundamental flaw. Pull that tab, and it’s open for good. You either finish it on the spot or accept that it’ll go flat, spill, or collect whatever finds its way in. For something this ubiquitous and this widely loved, that’s a surprisingly basic problem no one has managed to fix.

ReLid USA thinks it shouldn’t be that way. The company has developed a patented resealable lid that replaces the standard aluminum can end with a sliding mechanism, letting you open the can, take a drink, and close it back up again. The seal locks into place, preserving what’s left inside, and the whole thing stays 100% aluminum from start to finish, with no plastic involved whatsoever.

Designer: ReLid USA

The mechanism is about as intuitive as it gets. You lift the tab end the way you would on any standard can, then slide it back to open the drinking aperture. To reseal, slide the tab forward and press it down, and the can closes back up airtight. ReLid says the mechanism holds up for at least 14 reseals, covering a lot of sipping sessions before a can ever needs replacing.

What that means practically is that an unfinished energy drink can go back into a bag without soaking everything else. A half-consumed sparkling water can stay sealed and carbonated until you come back to it. Someone at the gym can set a can down between sets without worrying about spills or flatness. These aren’t exotic demands. They’re the basic expectations we’ve had from bottles for decades.

The sustainability angle is worth noting, too. Because the entire lid is aluminum with no plastic parts mixed in, it goes into the same recycling stream as any standard can, without any separation or special handling. There are no mixed materials to complicate the process, and since aluminum is infinitely recyclable, none of the material is lost when the can eventually reaches the end of its life.

The technology was originally developed starting in 2020 by Re-Lid Engineering AG, a Liechtenstein-based packaging design firm. ReLid USA, headquartered in St. Charles, Illinois, holds the exclusive North American license and engineered the product to slot into existing beverage-filling lines without any new equipment or changes to production. It works with standard 202 and 206 can end formats, covering the vast majority of cans already in use. The can format hasn’t changed much in decades, and this might be the most sensible edit it’s ever gotten.

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This Smart Jar Lid Uses UV Light to Keep Your Food Fresh Longer

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You know that moment when you open your fridge and discover that beautiful container of berries you bought three days ago has turned into a science experiment? We’ve all been there. But what if I told you there’s a clever piece of design that could help solve this perpetual kitchen problem, and it looks pretty fantastic while doing it?

Meet SmartLid, a reusable jar lid created by designers Hakan Gürsu and Sezin Hasgüler that’s basically giving your ordinary glass jars a serious tech upgrade. Instead of just sitting there looking cute (though these lids definitely do that with their array of fun colors), SmartLid actively works to keep your food fresh using UV-C light technology.

Designers: Hakan Gürsu, Sezin Hasgüler

The concept is surprisingly simple yet brilliant. Inside each lid sits a 254 nm UV-C LED that emits light known for its bacteria-fighting powers. When you pop this smart lid onto your jar, it creates a chemical-free preservation system that inhibits mold and bacteria growth. No weird sprays, no mysterious additives, just clean ultraviolet light doing what it does naturally. And here’s the kicker: it uses less than 1 watt of energy, so you’re not exactly running up your electricity bill for fresher strawberries.

What really caught my attention is how SmartLid tackles the sustainability angle from multiple directions. First, there’s the obvious benefit of reducing food waste. When your food stays fresh longer, you’re throwing away less, which means fewer trips to the grocery store and less strain on your wallet. But the designers went deeper than that. The lid itself is made from recycled ABS plastic and bio-based silicone, so even the product’s materials align with circular design principles.

The modular design is particularly smart. That geometric cutout sleeve you see wrapping around the jars isn’t just for looks (though those organic shapes definitely give off modern design vibes). It’s functional, allowing you to see your food while protecting the jar and creating a cohesive system. The lids come in a gorgeous palette of colors, from soft lavender and mint to bolder oranges and teals, making them equally at home in a minimalist Scandinavian kitchen or a more eclectic space.

Looking at the technical side, SmartLid is waterproof and sensor-controlled, which means it’s actually thinking about when and how to deploy its UV powers. This isn’t some primitive gadget that just blasts light constantly. The intelligence built into the system helps optimize the preservation process while being energy efficient. For anyone who loves tech-forward solutions to everyday problems, this is pretty exciting stuff.

The best part? SmartLid transforms containers you probably already own into active preservation systems. You don’t need to buy a whole new set of specialty containers or invest in some bulky appliance. Just screw one of these lids onto a standard glass jar, and suddenly you’ve upgraded your food storage game. This approach feels particularly relevant right now when we’re all trying to be more conscious about consumption and waste.

From a design perspective, SmartLid hits that sweet spot where form meets function. The product feels approachable rather than overly technical or intimidating. You could see it fitting seamlessly into contemporary kitchen aesthetics that celebrate both style and substance. There’s something refreshing about a product that doesn’t hide its technology but instead makes it part of its visual identity, with that purple glow visible when the UV light is active.

The designers made sure to connect SmartLid to broader global sustainability goals too. It aligns with the UN Sustainable Development Goals, specifically Zero Hunger and Responsible Consumption and Production. That might sound like corporate speak, but it actually matters. Design that considers its impact beyond the individual user and thinks about systemic change is design that can genuinely make a difference.

Kitchen gadgets often feel gimmicky or solve problems nobody actually has but SmartLid addresses something universally relatable: the frustration of wasted food and money. It does so with thoughtful design, legitimate technology, and a sustainability mindset that goes beyond surface-level greenwashing. Whether you’re a design enthusiast who appreciates clever problem-solving, a tech lover excited about practical UV applications, or simply someone tired of moldy leftovers, this little lid deserves your attention.

The post This Smart Jar Lid Uses UV Light to Keep Your Food Fresh Longer first appeared on Yanko Design.