On other hand calculating it in roughly 0.5 l bottles make numbers seem tad more sensible. 1 gallon is what 8 0.5 l bottles. So 1440 bottles a minute or 24 per second. And total would be 800 million bottles a year. Which actually seems not unreasonable number to run factory on. Gallon is not 4 litres, but less, still it is not that slow rate if you think of how much waters go to each bottle.
Well I'm drinking out of one now, and coke cans are way smaller than this, so tiny isn't the adjective I'd pick.
Doubt you're walking around with a gallon jug in your backpack either.
Most beverages are sold in 0.5L to 1L bottles (a wine bottle is 0.75L), so "those tiny bottles" make the most sense when we're talking about a bottled water company.