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Not ruined.
Use it in good health.

Not all the same.

But you do not need the special bowl to try a soap.
Most kitchen and grocery stores have small resealing containers for
left overs. Since the special container can cost as...

There are three sizes I know and as others noted glycerin soaps melt
to fit anything.
Large about 3"
Normal about 2.5"
Small (Scuttle) ??

Also there are thicknesses differences...