When you're a bit tired and achy from that morning workout or power-walk at lunch, what's better to pick you up and replenish your electrolytes than a nice cool coconut water? Packed with potassium, these tetra paks are rugged enough to toss in a purse or bag and can be resealed if you want to save some for later. Great to just keep in your drawer as they don't even need to be refrigerated!