The cake in the trunk will be upside down. If you have a special stand for the cake then it should be fine. If not, try to put the cake on your lap. Then, hold the cake by the rope in your hand to prevent it from going sideways. That's the safest way to do it. Hope this helps. Secure it with the rope. First of all, make sure that there is no luggage rack on the back seat of the electric car, if there is, you can directly fix it on the luggage rack, if there is no place to install the luggage rack, you can also directly install the takeout box on the back seat.