Test had to be taken 72 hours before trip to Hawaii for daughters wedding. Got a call with test results less than 36 hours before trip was to start. Sample was spoiled by leaking and retest is required. Earliest test can be done is less than 24 hours prior to takeoff - no way test results will be available. Have to reschedule trip and lose money on nonrefundable travel and living arrangements. User's recommendation: Don't use them!!!