Bring your own,
Make your own cooling Lunch container/ box/ bag.
Most people have a canvas bag with handles,and or plastic grocery bags,, use it for your lunch snack bag.
to keep your foods cold,,
Freeze a couple of water bottle filled 3/4 full.
place newspapers on the bottom of your bag or double bag 2 plastic grocery bags and line the bottom with newspaper,
Place the frozen water bottles on the bottom and put your lunch on top with another layer of newspaper. It really works, I've done it, especially since I've had the boys and $$ was so tight. I haven't bought lunch for almost 18 months.
I averaged $5 a lunch for 5 days X 52 weeks I saved $2,080 in my first year by not buying lunch out. I Still don't go out and buy lunch,even tho I can afford to now, I don't. I eat healthier, I recycle, and have newspaper for compost, and save $$ , It's a Win, WIN!