A "cup bra" refers to a type of undergarment worn by women that provides support and shaping for the breasts. It is designed with individual cups to cover and separate each breast. Full definition
Specifically designed for nursing mothers with built in soft cup bra for comfortable support and convenient one - handed nursing clips. (thefashionablehousewife.com)
Best suited for B / C cups this bra provides medium support. (health.com)
Full cup bras will offer the best comfort for growing breasts and also offer the versatility needed for maternity bras. (fashion-mommy.com)