"Correct, it it milled from plywood. It has the aesthetic of a pre-production prototype, like the real chair would be made from laminated wood. It is chunky, because plywood in this shape is much weaker than bentwood, so it needs to be much thicker."

"The vacuum is a consequence of the jar cooling down. (It being canned hot, to kill bacteria)It is also a safety seal, in that the lids have a section that is pulled down by the vacuum, and that indicates a seal. If there is a clicking sound when you press the lid, then the vacuum is gone and the seal broken.This product is a prime example of a "kitchen mono-tasker" that isn't even necessary, in that a kitchen knife will do the same job, and it being readily available, it will be easier to do with a kitchen knife.Not to mention the problem was solved more eloquently more than 20 years ago."

"Looks like they thought about that, you can access the screws to remove it. "

"The obvious route to make the inserts would be to cnc them out of aluminium. Their geometry let you do this as one-sided milling from pre-sized blocks.In 48 hours, with a decent cnc machine, you would get a much better surface than the prints can provide. If it is about prototyping, then standard abs will work, if it is about production run of 10000 bottles, the superior surface finish of cnc milled aluminium would be desireable. The 3d printing technology here is cool, but I dont really see a benefit to use it to make these inserts."

"one of the first examples I saw of nylon SLS prints, were a bouncy table tennis sized ball, with a hexagonal lattice design. I wonder whether making a big one needed an advancement in material properties, or maybe dimensionally accuracy. back then the dimensional accuracy was not great, and a basket ball that is not round is no good. Regarding fit for purpose, the main drawbacks, as I see them, are that it cant be deflated, so it will be expensive to transport in bulk, and its ability to take abuse. In a professional environment, this is not a problem, but in a rough one it is. It looks fragile, so the question of how much it can take before it breaks is intriguing. and children will likely try to find out. pneumatic basketballs are virtually indestructible, the only way to break them is to intentionally puncture them. It is an exciting product, but I think it in in the family of carbon fibre. high end, high performance."

"It has a low carbon footprint for a plastic chair. Not for a chair.The Thonet bistro chair is made of wood, so no need to recycle it, or at the end of its life it could be recycled into firewood by the consumer. The carbon footprint of wood is much lower than that of plastic. (Negative 1.8 kg co2 per kg, as opposed to plastics positive 6kg co2 per kg) Also, the bentwood chairs are shipped un-assembled, and they could fit 36chairs in one cubic meter.So when it comes to low carbon footprint chairs, the competition is a wooden chair, negative carbon footprint of 1.8 kg co2 per kg wood (beech) not sure about the carbon footprint of the steaming, 36 chairs fit in one cubic meter for transportation, and end of life is either returning to soil, or the energy is harvested (firewood) not to mention they were designed and produced a century ago, and many still survive.That is a tall order to outdo. Even for a plastic chair."