Passive Thermal and Humidity Behaviour of Steel and Insulated Shipping Containers in a Subtropical Climate: Multi-Container Field Dataset (Brisbane, 04-11 November 2025)

One-minute-resolution field dataset and analysis comparing five 20-ft shipping containers of differing colour, ventilation and insulation, plus a radiation-shielded external reference, under shared subtropical exposure in Brisbane, Australia, over eight days in November 2025. The package contains the raw per-logger CSV files (Govee H5179), a documented Python analysis script, per-day metrics, a flat container summary, a bootstrap confidence-interval table, a data dictionary, and a methods and assumptions document. The observation day is the unit of analysis (n = 6 full days); minute samples are not treated as independent. Headline result: dark steel units run about 8 to 9 K hotter than the cream unit at peak (day-blocked bootstrap 95 percent confidence interval excludes zero), the two dark units are not distinguishable at peak, and the insulated reefer stays coolest and most stable on every day.