The cost for a class of 12 students would be increased by $24.00 for shot glasses and $11 dollars for measuring spoons making the new total $77.50. However, dividing by 12 students would make the cost about $7 per student, and that falls with a typical lab fee for the course. This is an example where purchasing in volume for a class make the experiment more affordable. Finally, the materials left over can be used in the home and not wasted. Using the acid afterward may be an issue.