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Particles and capsules are used as containers for active ingredients to delay their degradation and control the location and kinetics of their release. Key to a successful application of these containers is a good control over their size, composition, and the release kinetics of encapsulants. These parameters can be tuned if containers are made from drops of a controlled size and composition; a method that enables formation of drops of a defined size is microfluidics. This review highlights some recent developments in the use of drops made with microfluidics to produce particles and capsules of controlled sizes, compositions, and structures.