How to hide bra straps in square neck top?

To hide bra straps in a square neck top, try a balconette bra.

A balcony bra, or balconette bra, has a shallow cup and wide-set straps that attach to the sides of the cup instead of the center.

Unlike a demi cup, which features cups that have a bit of an angle, a balconette bra's cups are typically cut straight across the breast, pushing the chest up rather than together. This style pairs perfetly with a square neck.