Explore Drip Hacks Half Hacks Concentrate DIY e liquids for mouth-watering flavours and taste fusions for your e-cig. Available in a 150ml (30ml of Flavour Concentrate. From moderately sweet flavours to all-out taste explosions, all our Half Hacks 150ml e liquid concentrates taste and smell delicious. Our Half Hacks Concentrates are nicotine free, so you can enjoy our flavours on their own or combine with the optional extra of our Nic Shott.