Precedent Heat Testing: using the internal system of a hair straightener.
Pros: heat gauge, potential adjustable temperature
Cons: Electrocution, temperature did not adjust
As shown below, we ended up using nichrome wire (80% nickel and 20% chromium)
Heat Tests Continued…Using the heated nichrome wire at different temperatures to fine an accurate temperature to melt the plastic milk bottle cap.
Heat Testing of the nichrome wire, which worked well and was chosen as the final source for the heating mechanism. Nichrome wire is used as the heating element in many household appliances such as hair dryers and toasters, as well as fireworks and explosives.

