There is no one way to color hair, and when it comes to different techniques, services and applications, colorists opt for different tools—like brushes or bottles—to get to their end result. But why? Why do some colorists choose to use a brush and bowl and others choose to use a bottle? Does it only depend on the service being done? Does it depend on what product you’re working with? We were curious, so we posed the question to our BTC fam on Instagram and Facebook, “Brush, bowl or bottle, and WHY?” Here’s what you all had to say!