Remember those hologram stickers that used to show two things at once, and all you had to do was turn the sticker slightly? There is a similar phenomenon in physics, and it even comes with a mascot.

Under the CCS rule, blue hologram stickers are affixed to petrol and CNG vehicles, orange for diesel-based ones and grey for the rest. The CCS is also referred to as the “third registration ...

“Instead of having a holographic sticker you can have the hologram directly embedded into any rigid plastic object,” she says. Just don’t eat them.