Inner disperse phase ratio φO1 determined by PFG-NMR as a function of the diffusion time Δ. The stirred double emulsions show the highest EE. ▴ represents φO1(O/W/O-1-S) ≈ 4.3% with a resulting EE ≈ 48%. φO1(O/W/O-2-S, ■) ≈ 1.2% results in EE ≈ 13%. All other double emulsions (other symbols), which were processed at high mechanical energy show an encapsulation efficiency EE near 0%.