Word of caution - this does not apply to countries with the most severe drug laws and associated punishments. There have been cases in UAE and especially Singa

Word of caution - this does not apply to countries with the most severe drug laws and associated punishments. There have been cases in UAE and especially Singapore[0] where travelers are drug tested on arrival and the presence of banned substances in blood or other bodily fluids is against the law. [0] - https://www.channelnewsasia.com/singapore/saliva-test-drugs-roadblocks-land-checkpoints-changi-airport-3303071 https://www.channelnewsasia.com/singapore/saliva-test-drugs-...