Yes. There are chances that the plastic bucket might melt down due to the immersion water heater. Even though there is a hook at the handle that is used to fix the heater to the bucket, it is suggested to take a wooden material and place it in the middle of the container. You can keep the rod over it and prevent the bucket from melting down. If the coil of the heater is in direct contact with the bucket, the bucket might lose its shape because of heat.