First attempt at beer render with global illumination and tone-mapping, 8-64 spp, 32 gl samples, 6 bounces, 8-32 light samples. 1:16:19 render time

Same settings as below but with my microfacet material. 13:08 render time

Same as below but with Cosine-Weighted Sampling

Uniform Sampling, 8-64 spp, 4-16 light samples, 32 global illumination samples. 20:26 render time