I use Bulk Powders complete hydration mix as they often go wirh hefty discount (70%) - only two tastes but orange is ok for my gut. I sometimes experiment with self-prepares mixes with different carbs (virtago or clustered dextrine) also from bulk powders as they are also discounted and I add little bit od hydration mix dor the taste - this way the mix is way less sweet. They have nice range of products - from ready mixes to single ingridients for your own composition and use. Recently I have upped the carbs intake to 70-80g per hour in a liquid form - so one 950ml bottle for the carbs and second one for the electrolytes with water without any taste (but their coconut water in the powder form is also very tasty, but tad expensive to use regularly).