If you've ever had Nutella, you're familiar with how amazingly delicious it is. If you live with roommates or family members, you probably know how quickly one jar can disappear. But don't worry - a kind German man is here to protect your Nutella from predators.

Inventor Daniel Schobloch created an acrylic lock for Nutella jars and decided to sell them on eBay for £9,99 (that would be $11.12 here in the United States). The lock was originally invented as a joke, but it's been selling like hotcakes.

The Nutella jar lock quickly sold out at 1,000 units and there are currently waiting lists for the product on eBay Germany.

What would you put a lock on? Tell me via email or on Twitter @mollieonair.

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