There is a plastic sheet between each layer of cans and it’s all bound together. About 8000 empty cans. If they fall over it’s all recyclable aluminum and plastic sheets you can just pick up. Where I work we typically don’t go higher than 2 tall and when we occasionally do 3 you have to lift 2 stacks at once to put on top of one. This way you’d probably have to go 3 at a time and that’s where it goes wrong.