Is there a race/working example?
The following is taken from a 100 km trail race with 3000m of elevation run recently, the runner (72kg male) completed the event in 10hrs 49min with Tailwind as the only source of fuel, electrolytes and hydration for the entire event. The temperature ranged from 16 degrees C at the start, to a high of 27 at midday, with a mild hot dry wind in the afternoon.
Start: 2 X 500ml Bottles with 250 cal (2.5 scoops Tailwind) in each, one with Lemon and one with Berry flavour, as well as 1L back pack with 5 scoops of Tailwind Mandarin Orange flavour - Total Calories carried 1000, enough for 4 hours running.
Checkpoint 1: 23.5 Km- Exchanged 2 X 500ml bottles, with premixed and prefilled 500ml bottles with 250 cal naked flavour in each -Total time in checkpoint 20 seconds - "mainly due to the length of the shute"
Checkpoint 2: 53.4 Km- Exchanged 2 X 500ml bottles, with premixed and prefilled 500ml bottles with 250 cal in each, one with Berry, one with Lemon flavour - Total time in checkpoint 30 sec
Checkpoint 3: 76.9 Km- Exchanged 2 X 500ml bottles, with premixed and prefilled 500ml bottles with 250 cal in each, one with Mandarin Orange, one with Naked flavour - Total time in checkpoint 30 sec
The backpack bladder was used to sip on at various stages during the day (if it took slightly longer then expected to complete a leg or a flavour change sounded nice) and emptied in the last leg, making it a total of 2500 calories consumed (25 scoops of Tailwind), the equivalant of around 230 Calories/hour and a total of 5 Litres of fluid for hydration.