Blending devices can be used to blend material directly in a container such as a disposable container, such as a paper or plastic cup. In some instances, a disposable container can be coupled to an adapter that includes a blade assembly to blend a food product. The food product can be blended directly within the container when the container is coupled to the adapter and supported with a support sleeve that at least partially surrounds an exterior of the disposable container. In further instances, a stand can selectively couple with multiple different sizes of sleeves and disposable containers to the adapter. The food product can be blended directly within the disposable container without causing damage or flex to the disposable container.