Manufacturers may list the max time the insulated lunch bag is designed to keep food cold (sticking an ice pack inside can also help), though Amazon reviews can provide insight into this as well.

Most insulated lunch bags claim to maintain a safe temperature for up to 4 hours (with an ice pack for cold foods), providing ample time for commuting to the office or traveling longer distances.

Insulated lunch bags are soft-sided and zippered; they usually have an inner mesh pocket and sometimes other pockets for ice packs, a water bottle, and utensils, but you will need to wrap or pack ...

and ice pack. It's even large enough to accommodate a 12-ounce drink alongside your food. It's well-insulated to keep food fresh. The outside is pretty and simple, yet this lunch bag has thick ...

These thin ice packs are just 0.5” thick, allowing them to fit perfectly into any lunch bag, lunch box or cooler ... packs kids at the top/sides of your insulated cooler to keep contents cold ...

Below, I rounded up top-rated ice packs to throw into a cooler or lunch bag that’ll keep your food and drinks chilled for hours. LaVecchia prefers brick ice packs because they tend to be more ...

Vera Bradley’s classic quilted fabric has been upgraded with an insulated interior and slip pocket for ice packs, so your food stays cool. It’s not the largest bag, but for a light lunch ...