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Product Features: 1. Yellow / Blue / Pink / White Color to choose 2. Ordinary Edition with button cell inside, unchargeable but changeable 3. Chargeable Edition with chargeable battery inside, can be charged with 5V Power supply 4. Rotate to On/Off when you get the Ordinary Edition Cups, please remove the insulation first ,then rotate to On/Off.the Chargeable Edition can directly Rotate to On/Off. Suit for: For Skating sports Package Includes: 10 pcs cups