Protect the Reef.
One Drop at a Time.

Smart beach lockers that rent reef-safe sunscreen by the millisecond to divers while storing their gear.

ReefTrunk tracks UV index and dive duration, automatically dispensing precise amounts of coral-safe sunscreen before each dive. No waste, no bottles—just the perfect amount of protection for today's conditions.

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The Experience

You walk up to a sleek solar-powered locker at the dive site, scan your wristband, and it unlocks your gear compartment. A touchscreen glows: "3 minutes until peak UV — dispensing your personalized sunscreen." The exact amount you need sprays into your hand—no bottle, no waste, just the perfect reef-safe formula for today's conditions.