Isn't it funny how people will walk right over those pennies. But as gdjoslin has shown they can add up! Growing up in Michigan bottle deposit was 2 cents. My brother and I picked up bottles one year and was able to buy my Mother a $7.99 Vegamatic for Christmas. We were so proud.
In later years the bottle deposit went up to 10 cents.
There are many ways people can save for a cruise or any vacation. I think it's where your priorities are as to how much and how fast you can save. Is the $4 Starbucks everyday more important or the vacation? The fancy nail job or vacation? It's all about priority.