https://phys.org/news/2018-05-artificial-cells-in-cells-triggered-mini-chemical.html

Artificial cells are based on containers called vesicles, which are built from lipids. They are used by scientists because they offer more control over processes than is possible with biological or natural cells.

Researchers from Imperial College London created a series of small vesicles that react to light by breaking their membranes, releasing the materials inside. The researchers then encased all these vesicles in a larger vesicle that does not react to light.