For twice the shine, just add water. That’s the tagline behind Lucie Davis’s winning concept: a pair of Swarovski crystal–studded rings, made from 100 percent compressed cellulose, that swell in size under the faucet. Davis beat out 38 of her undergraduate cohorts at London’s prestigious Central Saint Martins school for the award, which challenged participants to use upcycled Swarovski gems to create couture pieces inspired by the theme of “water.” This year’s edition of the competition, the art institution and Austrian cut-glass producer’s 15th, sought to provide students with the opportunity to “actively participate in the growing circular economy,” Swarovski said.

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“I feel extremely grateful and honored to have won,” Davis, who received £1,000 ($1,310) for her efforts, said in a statement. “It’s been a great experience working on the theme of water and sustainability.”

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By integrating crystals into a sponge material, Davis said she was able to lend an “element of preciousness” to the ordinary.

She added: “After this exciting experience, sustainability will definitely always be in the back of my mind when designing jewelry as it has been a great source of inspiration.”