An alternative method was also used to produce such double-like emulsion. Instead of adding oil and CTAB in the pre-formed all aqueous emulsion, an oil-in-water emulsion was first prepared by adding oil and CTAB in a more concentrated single PEG aqueous phase (20 kDa, 8%, 4mL + 200 µL Hexadecane and 100 µL CTAB (5%)). This mixture was sonicated as above to form an oil-in-water (PEG) emulsion (not shown). Then, a concentrated dispersion of Dex (21%, 1mL) was added upon vigorous agitation, affording the double-like or Pickering emulsion as described above with droplets having the same diameter (not shown). The stability and robustness of such double-like emulsions were further evaluated by adding other chemicals: to the double-like emulsion prepared as described above (1 mL), the sulfate derivative of Dextran (DexSulf, 500 kDa, 5% in water, 200 µL) was added upon vigorous agitation. This yielded droplet having a slightly higher diameter of about 8 µm and noticeably, the shape of these compartments was also less spherical (figure and). Again, the use of Nile red allowed observing the oil-in-water small droplets shell at the surface of Dex-rich droplets (figure ). In the same way, the use of FITC-labelled DexSulf showed fluorescent circles attesting that this polymer was also localized at the interface (figure ), very logically interacting with positively charged oil-in-water droplets stabilized by CTAB.