Home / Nicotine Vape Juice and Salts / MBV (Micro Brew Vapor) / MBV – Grumpy Old Bastard 6MG 100mL MBV – Grumpy Old Bastard 6MG 100mL MBV – Grumpy Old Bastard 6MG 100mL A rich and decadent butterscotch caramel cream. To those who have experienced Grumpy; Arguably the best E-liquid flavor in America! Made in small batches with custom extractions. Categories: MBV (Micro Brew Vapor), Nicotine Vape Juice and Salts Product ID: 15930 Check out our other products Coastal Clouds – Mango Berries 3MG 60mL Keep It 100 Synthetic – MLOW 6MG 100mL (Mallow) Coastal Clouds – Mango Berries 6MG 60mL Keep It 100 Synthetic – MLOW 3MG 100mL (Mallow) Czar Nicotine – 0.9mL Concentrated Nic Solution 360mg