There are several great bands of insulated lunch bags that are great for keeping the temperature of your food. You might want to try Ensign, Built in NY, or PackIT, they are all great brands for your food.
Insulated lunch bags or boxes, sometimes even small brown paper bags
Insulated lunch bags for children can be found at Amazon.com. Prices start at just $6.00 for a basic model and go upward form there.
Insulated lunch bags can be bought online from most online stores such as Amazon. Otherwise I would advise you to have a shop around your local grocery stores as I'm sure they will have them. Wallmart almost certainly has insulated lunch bags.
Insulated lunch bags help foods stay cool or warmer much longer than a typical paper bag. They can also seal in freshness, so things like fruit will stay good much longer, too.
I highly suggest the following:http://www.amazon.com/Ensign-Insulated-Lunch-Cooler-Bag/dp/B000I3239A, http://www.etsy.com/shop/JulieMeyer, and http://www.reuseit.com/store/built-gourmet-getaway-large-insulated-lunch-style-series-p-930.html.
The weight of a lunch bag typically ranges from 100 to 300 grams, depending on the material and design. Lightweight options, like fabric or insulated bags, tend to be on the lower end, while more robust, insulated or cooler-style bags may weigh more. Overall, the specific weight can vary based on brand and features.
Glad Products Company.
paper and bags duuu
If you're looking to purchase insulated food delivery bags here are a few places you could check out: Alibaba Oasis Bags WebstaurantStore Caterers Warehouse Bagmasters
In zellers
Using paper lunch bags helps the environment much much more than using a plastic bag.
Yes, they are that's what keeps them wet