To take your liquid style to the next level, create a new layer above your styled layer and manually paint in a few tiny, pure-white "specular highlights" using a small, hard brush. These "micro-dots" of light simulate the brightest reflections of a studio softbox and make the liquid look incredibly fresh and wet.
Inner Bevel | Technique: Smooth | Depth: 100% – 200%. Cum Photoshop Layer Style