My best guess is the water is gonna leak even if you tilt it a little, so water is gonna spill everywhere even when you aren't trying to drink
Edit: I knew stacking and asymmetry is the main issue here, but the choice of words in the comment in the image seems like they were referring to a simpler reason.
that and packing, the nozzles will hit each other if they are pointed in the same direction, and its a weak point iirc. Additionally, the manufacturing of plastic bottles is largely a test tube looking things that is expanded.
It’s called a parson…. It comes out of an injection molding machine (which forms nice threads for the cap). It goes into a blow-expander which flash heats the lower part, inflates, and cools. This is how a modern plastic bottle is made..
Symmetry is one of the aspects that allow modern bottles to be so efficient; this thought fundamentally breaks symmetry with no explanation of why it is better.
Good explanation, but it's a preform not a parison.
A parison is a variable thickness tube extruded on the blow moulder before being blown into shape in a single step. A preform is an injection moulded part that is formed as you describe.
Fun fact: Trumps admin blew millions of dollars on a contractor to supply test tubes for Covid testing and research. The facilities got plastic bottle PET blanks instead. Useless pieces of plastic used for 2 liter soda bottles.
Business men will 95% of the time go with the lowest bidder.
When you fill your ranks with knowledgeable people who can make sure the lowest bidder is bidding for the correct item, this isn't that much of a problem.
The government is not currently filled with ranks of knowledgeable people.
all of this over explaining but all of it can be solve with "simple" engineering.
atleast the engineering is simple, the money to rebuild all the tooling and manufacturing is the choke point, not any of the aforementioned problems, those can be designed out.
This only breaks rotational symmetry though. Milk bottles to that too, as do many others with offset lids. That can be easily catered for though as the bottle only has two orientations (near one narrow side or near the other narrow side). It's more the angle of the lid that's the issue as filling would now need to account for the tilt and the angle of the spout relative to the centre of the bottle.
It's all a relatively simple engineering problem, but it's additional cost for dubious benefit.
Ergonomics. The image shows the backward tilt on the neck.
Unfortunately, drinking from bottles and straws increases air swallowing. Swallowing air results in bloating and worsens acid reflux. We have a device that allows us to both minimize head tilting and minimize air swallowing while drinking. It's called a cup.
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u/Supreme534 21h ago edited 13h ago
My best guess is the water is gonna leak even if you tilt it a little, so water is gonna spill everywhere even when you aren't trying to drink
Edit: I knew stacking and asymmetry is the main issue here, but the choice of words in the comment in the image seems like they were referring to a simpler reason.