These stainless steel ice packs are awesome!!
Made of 18/8 stainless steel and filled with distilled water, these little gems freeze fast and keep your lunch cold for 4-6 hours.
Best part: they are 100% non-toxic so it's safe to go inside your container with your food! For example, place it at the bottom of your container, put your salad on top and when you're ready to eat, just drizzle your dressing on top. You can't puncture it, its keeping the container with food cool, and when you're done, you can simply wash it off and put it back in the freezer for next time!
Also great for sore muscles, bruising, and headaches.