Apparently, Pepsi is best consumed at a temperature of 45F.

For my project, I created a simple circuit used to check whether the temperature of a cold drink is cold enough to drink.

I used a thermistor to calculate the temperature and a bulb as output. If the temperature is less than 50F, a green bulb will start blinking until you remove it from the stand.

For this video, I placed an ice cube by hand to show how the circuit works. After  a while, the light began to blink and stopped when the ice was removed.