Why are some of potions in the shop sparkling?

Why are some of potions in the shop sparkling? - Neon Signages Inside a Computer Gaming Shop

Some of the potions that can be bought from the shop now have a kind of sparkling, glittering animation to them. For example, see the two leftmost potions in this picture:

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I read the release notes of the Watcher DLC; it mentions that several potions now have new icons.

Is this a purely cosmetic change, or do the sparkles affect gameplay?






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Why are some of potions in the shop sparkling? - Off road car parked near entrance of shop with luminous lights at dark night
Why are some of potions in the shop sparkling? - Brown and White Concrete Building





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Images: Yan Krukov, Sasha Kim, Erik Mclean, Mizzu Cho