Table 1. Properties and parameters.

Name	Symbol	Value	Comment	Source
Heat capacity:	Cp			[43]
Bottle and nipple	Cp	1800 J/(Kg K)	Estimated	[44]
Milk	Cp	3930 J/(Kg K)	Estimated	[45]
Water	Cp	4182 J/(Kg K)		[45]
air	Cp	1006 J/(Kg K)
Density:	ρ
Bottle and nipple	ρ	900 Kg/m3	Estimated	[43]
Milk	ρ	1030 Kg/m3	Estimated	[46]
Water	ρ	998.2 Kg/m3		[45]
air	ρ	1.225 Kg/m3		[45]
Thermal conductivity:	k
Bottle and nipple	k	0.2 W/(m K)	Estimated	[47]
Milk	k	0.5369 W/(m K)	Estimated	[48]
Water	k	0.6 W/(m K)		[45]
air	k	0.0242 W/(m K)		[49]
Thermal expansion coefficient:	β
Milk	β	8 X 10−4 K-1	Estimated	[50] [45]
Water	β	2.07 X 10−4 K-1
air	β	3.43 X 10−3 K-1	Ideal gas at 18°C
Viscosity:	μ
Milk	μ	3 X 10−3 Pa s	Estimated	[51]
Water	μ	1 X 10−3 Pa s		[45]
air	μ	1.789 X 10−5 Pa s		[45]
Heat transfer coefficient:	h	10.45 W/(m2 K)	Estimated	[52]
Milk volume:
Bottle 1		60 ml
Bottle 2		178 ml
Bottle height (with nipple):
Bottle 1		49 mm
Bottle 2		140 mm
Total bottle volume:
Bottle 1		107 ml
Bottle 2		324 ml