If you can get some mini ice packs you can make up some interesting salads in a plastic container with butter beans, shredded red or white cabbage and chopped spring onions. Blend together with the smallest smear of mayonnaise and salad cream and you will have a satisfying but substantial snack. You can also mix chopped apple and cashew nuts with the beans. Waitrose do the best tinned butter beans. You can also buy tins of mixed beans from various supermarkets, and add chopped celery, red pepper, raw carrot, etc.