Most desired Sci-Fi Invention

[Nate the Great]

I've been working on a "Grant Scale." For those who read the fine print on my fivers, Grant is my "stage last name." Operating with the following goals in mind:

1. Zero Grant=Absolute Zero.
2. The freezing and boiling points of water should represent reasonable numbers divisible by ten (with a little slush allowed, after all the temperature of water alters these properties and scientists would have to look up these things on a temp/pressure chart anyway)

I've come up with the following properties in mind. It's really picking coordinates off of a y=1.366x chart where x is the melting temp and y is the boiling temp. 1.366 is the ratio of water boiling to freezing on the Kelvin scale. I'm rounding off the boiling point, as I imagine that pressure and other factors allow for a little more variability in that temp than freezing.

Kelvin: (273.15, 373.15)
Farenheit: (32, 212)
Grant 1: (140, 190)
Grant 2: (160, 220)
Grant 3: (300, 410)
Grant 4: (600, 820)

I think that Grant 1 is really nice. The normal human body temperature is about 159, or even 160 if you're generous. Room temperature (60 Farenheit) is about 148, sloshable to 150.