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Once you've ripped all of your albums to your computer, the original compact discs become little more than untouched relics from a slightly simpler time. Up+ Weights recommend a new purpose for these castoff storage devices, providing a way for their physical specs to be exploited, rather than their digital ones.

Designer Seung-il Kim conceived a dumbbell with lightweight recycling plastic containers on each end that can open for the insertion of CD-ROMs. With each one weighing about 0.15 grams, the object can reach a maximum of 2.2 kilograms. Ideal for slight women who prefer to exercise with a focus on repetitions rather than poundage, the Health Green Up+ Weights are also remarkably light on the environment.