I'll sell you a piggy bank containing a $10 bill for $10.01 How much does the piggy bank actually cost? Even though you initially need to hand me $10.01, you ca

I'll sell you a piggy bank containing a $10 bill for $10.01 How much does the piggy bank actually cost? Even though you initially need to hand me $10.01, you can immediately crack it open and put the tenner back in your wallet, so the piggy bank actually only costs you a penny Now suppose the piggy bank is actually a soda bottle. Returning the bottle to the store gets you five cents, plus the ten dollar bill is still inside, so the combination is worth $10.05 when broken up, but only $10.01 when together. Thus the bottle-bank has a negative value. This might be because a bottle-bank is slimy and disgusting. Read whatever you will into this analogy :-)