Hi, My son is going to the first grade this year. I am looking for some good lunch boxes. I used a plastic lunch box with partitions last year for kindergarten. I got that from Costco. I was just stressing online about other lunch boxes and saw some bento boxes from Amazon. Have any of you used that? Any reviews? Have you tried stainless steel lunch? I see the price is little high for the stainless steel lunch container in Amazon. I will check in other stores too if it's cheaper. Any input is appreciated. Thank you.