Ensuring better food packaging

I love this Spar. It is convenient on my way from work and have almost everything I need, especially FRUIT & SALADS. Fresly prepared. BUT the packaging sucks. The plastic bowls and lids just isn't enough from the food spilling out at the slightest bump. The lid pops open and there goes a nice prepared bowl of fruit to waste when it hits the inside of my boot like yesterday. The grocery bag fell over. Can you not take extra measures in securing the lid to stay close? Please, this will help a lot. I wasted almost R40 yesterday on that fruit. And this is not the 1st time it happened to me.