Number of self-serve wines by the glass at the new Sonoma, California restaurant Matheson. The restaurant’s main attraction— is a wine wall where the self-serve wines by the glass are housed. Wine is dispensed through a machine that allows diners to choose a 1 oz., 2.5 oz., or 5oz. pour. The most expensive self-serve wine on the list is a Merlot blend ($26/$65/$130) from Vérité in Healdsburg.