You know we love cellphone straps around here, so how could we resist what could be the ultimate cellphone strap ever? This one's called the Tokyo Micro garden, and contains a "nutrient-rich gel" and a plant which actually grows over time. Cool, yes, but even cooler when you smash it against a would-be-mugger's face and give him an eyeful of gel and plant matter.

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Product Page [Dirtymicrobe via Notcot via Spluch]