Abstract: An aeration device, and containers or vessels incorporating the same. The aeration device can comprise a plurality of interchangeable aeration elements that can produce gas bubble of different sizes and deliver them to the contents of the container. Also disclosed are containers, such as a disposable or single-use container, optionally having one or more inlets and one or more outlets, an aeration device including a plurality of aeration elements, and a mixer to cause mixing, dispersing, homogenizing and/or circulation of one or more ingredients contained or added to the container. The container can be a bioreactors and the aeration device controls the dissolved gas concentration content of the bioreactor contents, thereby facilitating proper growth of cell cultures in the bioreactor.