I put re-useable ice packs in my kids
lunch boxes. It keeps it cool until lunch time. You can also freeze the
drink; it doubles as the ice pack then.
Just be sure and only freeze half or
take it out earlier. I don’t send pre-packaged drinks with my kids so I only
freeze half the bottle and the next morning will fill it the rest of the way
with their drink. You can also invest in a good Tupperware type sandwich
container.
It keeps the sandwich from getting squished around. You can definitely
recoup your money in the amount of bags you will use over the years. Hope this
helps!
I am looking for advice on how to keep my sons school lunch (sandwiches
etc) cold and fresh.