Sweet 'n' sour stamps

London's Metro is reporting, "Move over scratch 'n' sniff, the coolest stamps on sale are now lick and taste."

"New stamps to celebrate the Chinese year of the pig not only show the animals but also taste of them. When you scratch the front of the porcine postage stamps, the 'tasty aroma' of sweet and sour pork is released. Lick the back and you can taste the famous Chinese dish, too."

The stamps have gone on sale in China ahead of their New Year, which falls on February 18.

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