This video clip is from the Global Cycling Network Youtube Channel

Knowing what – and how much – to take on a long ride can be a tricky buisness. We’ve taken the guess work out of it, and tell you what you need while traveling light.
Subscribe to GCN:

There are three essentials to cover: fluid, food, and tools.
We recommend, if possible, taking two bottles and filling up mid ride to make sure you are not burdened with unnecessary weight. Take one piece of food per hour, but you need to find out what works for you.
Finally, take two inner tubes, pump and a multi tool to cover the basic mechanical issues you might encounter. Remember though that nothing substitutes a well serviced bike before you set out.