There are definitely a few uses in the BBQ world. Just heat in a microwave for three minutes and you are good to go for a long time. Maybe a trick for the competition team too,
Amazon Description: Easily heated in your microwave or cooled in your refrigerator or freezer Safer than gel; filled with non-toxic liquid Distributes the heat or cold evenly Extremely durable FDA-approved flexible outer film can withstand over one ton of pressure! Can be placed in any type of container for continued heating or cooling One-Year Limited Warranty