Just be aware for true efficacy, 70% alcohol must have substantial contact time (>5minutes) for certain organisms and for some organisms it is not effective at all. For the most part (there are a few exceptions), hand sanitizers are window dressing at best and can be detrimental by killing normal skin flora that help prevent pathogenic (disease causing) organisms from becoming established. Normally, hand washing with warm water and soap remains as one of the best approaches to sanitation. The goal is to reduce, not eliminate (which is not possible) gross contamination. Your body has natural defense mechanisms to combat the remaining low levels of harmful organisms. In a long-term survival situation with minimal water, you can still achieve sufficient hand sanitation with just enough water to lather your hands with a little soap or no soap and a handful or two of rinse water.

Pete