We were scrolling through Amazon, as we do, when we came across an effective eye cream that has shoppers stocking up like ...

“I started using the Caffeine facial serum under my eyes morning and night. It has improved my dark purple under-eye circles that I have lived with since childhood,” wrote one shopper.

The latest gem I’m snagging? The Ordinary’s Caffeine Solution eye treatment that’s just $9 on Amazon (a.k.a. less than my lunch).