Any vessel for holding water can symbolize your womb as water represents life.
An unclean vessel (anything that can hold water, e.g. a cup, glass, bathtub, barrel, etc.) means you do not respect your femininity. Often the cause is being conditioned at a young age to view sex as dirty. This comes mainly from a religious background where a woman who had a child was considered unclean until purified by the church. This can lead to viewing any part of your body that distinguishes gender as unclean or dirty.
