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(November 2010) First Endurance’s EFS Liquid Shot (don’t call it a “gel”) comes in an innovative refillable five-ounce flask that allows you to only take in as much nutrition as you think you need. You can snap the top closed and slip it back into your jersey pocket. Only available in Vanilla (Wild Berry coming soon). The taste is sweet but surprisingly easy to digest during training. There’s also a 30-ounce refill container available for $29.95.