Cool solutions are heat related breaks that are outside of any lunch/breaks required per your local supplement.
One of the “cool solutions“ methods is to take your lunch, at the appropriate time (likely the hottest part of the day), in a cool ac space. If you need to get drinks, rest, cool down, or take a mental health break due to the heat, that is on company time. Safety is number 1. Any issues from management call your BA, shop stewart, OSHA, email Carol, your health and safety co chair, local news channel Etc. Seriously do not play around with your health in the heat. Drivers need to take ownership of heat related safety issues because the challenges out in the heat are all too real.