If your cake does not fit, don't worry! You can trim the bottom of your wedding cake if it's too tall. Alternatively you can choose to just put a slice of your wedding cake into KeepCake.
Please note, in order to create a proper seal, it’s important to leave space between the vacuum valve and the top of the cake. If the valve makes contact with the cake, the vacuum pump will not be able to successfully pull the surrounding oxygen from within the container.
In other words, if the vacuum valve is smushed into the cake, the valve will be clogged up and therefor the pump won’t be able to suction the air.