Wall-E Easter Egg - Bolt and Cars References

In scene 4, A Day at Work, right before WALLE finds the plant, he is seen playing with a bra, which he tosses into his cooler. As this scene continues, he tosses in a dog which closely resembles Bolt. Continue a little further after he plays with the paddle ball and the ring box, he tosses in a boot, and then the Piston Cup from Cars.