Table 1. Material Property of Content, Bottle, Film and Gap

Part	Material	Density(kg/m3)	Thermal conductivity (W/mm°C	Specific Heat (J/kg°C)
Content	Water	997.4	604	4179
Bottle	PET	1370	240	1000
Film	PET	1370	240	1000
Gap	Air	1.1614	26	1007