Slurries comprise liquid water, about 2% to about 70% ice by volume, and one or more additives affecting flowability and/or tonicity of the slurry. Solutions for making a slurry comprise liquid water and one or more additives affecting flowability of the slurry. Flowability of the slurry relates to ice particles capable of flowing through a cannula, such as a needle. The slurry is suitable for injection into subcutaneous fat of a human subject for removal of adipose tissue.