Fig. S3.

Branch choice experiment with 70-$\mathrm{\mu }$m (diameter) droplets in $5\text{wt}\%$ TTAB. Data were binned by $\mathrm{\Delta }t$ using $100$ events per bin and then averaged (the corresponding $\mathrm{\Delta }t$ range is marked by the bar width). Fitting $\xi$ to Eq. S4 resulted in the parameters $a=-2.5\pm 0.2$ and $b=(5.9\pm 4.7)\times {10}^2\text{s}$.