This depends on how often you shower! If  you keep water from pouring down on the soap while it sits, each bar should last between two and three weeks on average.

Months - and with stronger smelling soaps, up to a year!

No.

Yes!  It's sure pretty, but it's still soap.  Just use it like you would use a bar of soap.

Soap should be stored in a cool and dry place like a clothes closet or drawer in a paper bag or paper box. Soap should not be sealed in a plastic bag, as it is constantly giving off moisture and could spoil if unable to breathe.

Generally, commercial soaps carried at most chain stores, etc. are full of chemical additives which not only dry out skin but can lead to rashes and other irritations. Additionally, most soap companies remove their soap’s natural, skin moisturizing glycerin.

Using commercial soaps over time can leave skin dried out, sensitive and feeling like its never clean.