My favorite lunch tote

I've been using embark brand lunch totes for about 3 years now and they stand up to the wear and tear of daily family life. A big problem I've had in the past is whether or not a lunch tote will keep things cold because I don't have a refrigerator in my work office. I can rely on this lunch tote to keep my items cool (with a medium sized cooling pack) from 6am-6pm and the items have not spoiled. That's even in Houston heat!