sir_isOanswered grow question 4 years ago The best pots I've used, were white weaved sort of garden refuse bags. Though I've not tried smart pots, coz I can get like 50 other pots, nutrients and shit for the same price.
The weaved shit automatically meant good aeration, some root pruning (coz they don't entirely block uv). It being white also helped a lot in summer here (coz it's super hot, I grow outdoors and black pots get excessively hot, though I use them, coz that's what I got). The thing about those refuse bags, they were like 0.60usd each. and they only last for about a year/one season (depending on conditions). Definitely the best pots I've used though.
Had a 3.5m plant in around 75l soil in one of those pots.
Here's are some pics of the roots of that plant:
https://ibb.co/YZyb1f8
https://ibb.co/yVSvnnx
https://ibb.co/Jmr5cKp
Oh and for practically no watering, I used the inner of a box of wine (that mylar like shit) to excellent effect a few times.
It's a bit ghetto, but if you do it right, it works super well.
That wine box inner was excellent in winter, btw (very dry and cold here) coz it insulated so well.