Depending on the conditions for decomposition, it varies. It may take up to 80 years.
You can read more about decomposition of many household items, including cans, below.
50 years!!!!
forever.....
it takes 20 years approximetly to break down.
4 minutes
1 miller second
3 years
Years apparently
The water will not ever break down. You will need to remove it.
Aproximately 15 minutes.
2 secs
Disposable diapers can take as long as 550 years to decompose.
4-6 hours.