Amazon’s holiday bestsellers include smart plugs and toothbrushes

The hottest tech in other categories was decidedly strange at times, too. For instance, the best-selling beauty items were led by toothbrushes — Philips’ Sonicare Diamond rechargeable brush was the top worldwide item, while Oral-B’s Black Pro 1000 was one of the US leaders. Robotic vacuums were “among” the bestsellers, as well. Hardware buying habits …

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