What you can put on your fridge is limited by weight, but also by other factors. For weight – the limitation here will actually be your arms. A fridge is a sturdy appliance, and if you can lift an object above your head, then you can probably sit it on top of a sturdy refrigerator. However, make sure that any items aren’t blocking airflow around the fridge. Warm air is exhausted out the back and needs a way to escape. Additionally, the objects on top of the fridge will likely get warmed, so don’t place wine or fruit up there.