Toyota FORTUNER 2021 Owner's Manual page 354

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5-3. Using the storage features
WARNING
When using the auxiliary boxes, do not use the cup tray.
If a cup, beverage can or bottle is placed in the auxiliary box, it may be
thrown out of the box in the event of an accident or sudden braking,
resulting in injury (type B).
Do not store items heavier than 0.2 kg (0.4 lb.).
Doing so may cause the auxiliary box to open and the items inside may fall
out, resulting in an accident (type C).