Technology company American Green Inc. is developing vending machines for easy access to age-restricted items. The marijuana vending machine could be filled with whatever the owner wants: Identity-sensitive things like medications, alcohol, firearms, and cannabis are their ideal case.The machines scan for your age and identity using “finger vein technology,” as Fast Company reports.

They claim it’s more secure than a fingerprint, which could be duplicated or, in some bizarre situations, chopped off and placed on the scanner. If you cut off a finger, the fingerprint stays—but the veins inside collapse.

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Source: Soon, we could be buying weed from a vending machine – NY Daily News