Surfactant system capable of forming a dispersion of vesicles or liposomes constituted of alkyl polyglycoside of formula RO(X)n, in which R is a linear or branched alkyl chain, with or without unsaturation, and having 8 to 12 carbon atoms, X being a pentose residue, and n, representing the average degree of oligomerization, is between 1 and 3, and of a hydrotrope or co-solvent.