Disclosed herein are compositions, devices, and methods that provide cellular materials in ready to use formats for experimental, therapeutic, and tissue engineering protocols. For example, compositions containing frozen or non-frozen cell present as aggregates are disclosed. Also disclosed a compositions containing cellular materials that after storage are suitable for dispersion, e.g. by 3D printing. Also disclosed is a kit for producing bioink compositions. Also disclosed is a closed system device comprising a cell material composition described herein.
