The real reason you shouldn't get this lunch box is because it isn't big enough for an adult lunch. You can barely fit anything in there.

I personally recommend something larger, but also colorful, like:

https://www.amazon.com/MIER-Cooler-Insulated-Grocery-Camping/dp/B01CV8JH7A/ref=sr_1_31_sspa?keywords=large+colorful+cooler&qid=1567165735&s=home-garden&smid=AOS50KZQHSN13&sr=1-31-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUFHSDIxNUlIM1YySDkmZW5jcnlwdGVkSWQ9QTAxNDY1MTNLTVRRTE8zWkdIMVYmZW5jcnlwdGVkQWRJZD1BMDcwMjg4MTIzTk9NUFpMOFdNV0smd2lkZ2V0TmFtZT1zcF9idGYmYWN0aW9uPWNsaWNrUmVkaXJlY3QmZG9Ob3RMb2dDbGljaz10cnVl

or

https://www.amazon.com/Cooler-Insulated-Dispensing-Multiple-Pockets-10L/dp/B07GZNJJWQ/ref=sr_1_1?keywords=large%2Bcolorful%2Bcooler&qid=1567165735&s=home-garden&sr=1-1&th=1