Happened to find: Looking for acidic toilet bowl cleaner for a friend with well water and toilet bowl stains and found this question for Zep brand:
Q: What altitude is your zep acidic toilet bowl cleaner - 32oz zuatbc324
- bottled at? Will it leak if shipped to 8,000 feet above sea level?
A: 740 ft above sea level
it's in a flexible (vinyl?) bottle. Do you think there is any chance it will leak even at the top of Mt. Everest? Does he think the air inside will make the bottle burst?