Last-mile e-grocery: gel packs at the doorstep hand-off
The doorstep is hotter than the van. How to size gel packs for real dwell times, place them for a sun-facing step, and cut summer melt complaints by route.
The doorstep is hotter than the van. How to size gel packs for real dwell times, place them for a sun-facing step, and cut summer melt complaints by route.
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