It really depends on the kind on vacation you have; ie a beach holiday requires more lotion than a week of golfing. Usually you need a little less Shirudo lotion than sunscreen for the same period/conditions. Remember only a small quantity of AGR+E or Sol+3 lotion is enough, the important is to massage well. Two 6oz tubes are enough for a full week at the beach using all over all day long. For a week at the beach we recommend our AGR+E Value Bundle or Sol+3 Value Bundle.