Disability Friendly Lunchbox

Hi, 
My name is Emily and I am a 3rd year Occupational Therapy student and have been tasked to create a product for a 'dragons den'. I have designed a magnetic lunch box for children and have created a prototype. The box closes using 3 sides where magnets are sewn into the lining of the fabric. It has a removable arm strap and a removable scooper plate inside. The box is easy to use, dishwasher/washing machine safe and aims to give the children more independence with social eating at school. I have attached a photo. I am just looking for any feedback or further suggestions to improve my design? Thank you very much!