with three values of k int each (5Wm -2 K -1 , 10 Wm -2 K -1 , 20 Wm -2 K -1 ). Figure illustrates the various characteristic distributions for all studied cases, including the cases without interaction. Compared to the isolated vial, thermal interaction leads to a decrease in solidification times due to the heat exchange with the neighboring vials: Vials solidify faster, the stronger they thermally interact with their neighbors. On the other hand, the variability in nucleation times becomes more pronounced: while the time of the first nucleation event is not affected by thermal interaction, subsequent nucleation events are increasingly delayed in time with increasing interaction. This is especially true in the nucleation-limited regime, i.e. at -10°C: Here, the heat received from the early nucleating vials may heat up the neighboring vials towards the metastable regime, basically preventing nucleation events until complete solidification of the early nucleating vials. Nucleation temperatures, finally are affected to a smaller extent than the two other quantities, with values being slightly increased compared to the single vial system. This increase again is a consequence of the vials spending more time in the metastable, supercooled state due to heat received from their neighbors.