The pathogenesis of ectopic gastric mucosa is a matter of debate between a congenital-embryological-and an acquired origin-consecutive to a gastroesophageal reflux (GER) like Barrett's esophagus -, the most commonly accepted theory being that these areas are embryological remnants.
Standard size latex filled helium balloons stay afloat for approx 8 - 12 hours, metallic helium filled balloons float for 2-5 days. I have found that a 36 latex helium filled balloon can stay afloat for a number of days due to the thickness of the balloon and the massive quantity of helium.
How Long do Vape Coils Last? How you vape and how well you treat your coils can significantly extend their lifespan. Generally, new coils last between one to two weeks, but that can be extended if you properly break in new coils when you get them and practice good care and maintenance procedures during and between usages.