Calorimeter Cup - Polystryene
Very economical way to do calorimetry, sometimes called a coffee cup calorimeter.
This polystyrene cup has a lid that can be closed. The user fills the cup with a known volume of water and then inserts a thermometer through the lid. When a chemical reaction occurs, the heat of the reaction is absorbed by the water, and the change in temperature is used to calculate the heat that has been absorbed.
Simple, easy and effective.