DK Cooler DIY e liquid flavour shots - offering something different to the usual DK flavours. This range of cool fruit blends will surely have your taste buds dancing. From the Donut King range, manufactured exclusively for ELFC. These flavour shots are 250ml bottles containing 50ml of flavour concentrate. To mix DK Cooler flavour shots, simply top the bottle up with base mix and nicotine shots then shake well.