TSD's Subzero with the extra shot of menthol. Subzero is a menthol/mint combination, so adding an extra shot of menthol will put it ahead. I have tried MB's Mandarin Ice and TSD's Subzero (without the extra menthol) and the mint in the Subzero adds some cooling effect to the subzero that edges it ahead of MB's. I would imagine with extra menthol the Subzero is quite chilly.