Toyota 2012 Highlander Owner's Manual page 382

3-6. Using the storage features
CAUTION
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Items unsuitable for the cup holder
Do not place anything other than cups or beverage cans in the cup holders.
Even when the lid is closed, items must not be stored in the cup holders.
Other items may be thrown out of the holders in the event of an accident or
sudden braking and cause injury. If possible, cover hot drinks to prevent
burns.
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When not in use
Front (type B) and console box cup holders: Keep the cup holders closed.
Injuries may result in the event of an accident or sudden braking.
406
Cup holders