I wear a nursing tank daily. Wear it under a cardigan, blazer, kimono, slouchy top, flowy blouse, tunic, or hoodie. Layer on a scarf or chunky necklace. Tuck it into a maxi or skater skirt. Wear it with jeans or yoga pants. All the while, have easy clip-down nursing access and bra-like support.
My favorite two nursing tanks are:
Bravado Dream Nursing Tank which comes in bra-specific sizes from 34B/C to 40F/G.
Bravado Essential Nursing Tank which comes in bra-specific sizes from 34B/C to 44F/G.
A variety of color options can be found on Amazon. Get one (or more) in every color in your size. I know I did!