Depends how many pots and how you wish to align them - you can make your own supports just using wood. I have bought the terracotta feet but that was a long time ago so no idea of the cost these days.
They are not exactly cheap if you've got lots of pots. I don't bother, having had a large pot blown or knocked over and smashed one year. I've not had any problems with drainage that I know off but they do tend to keep the ants and woodlice out of pots. You could just use offcuts of wood or slabs.
I bought some rubber pot feet, they are like ice hockey pucks, and once the pot is balanced on them, they are invisible. https://www.amazon.co.uk/plant-pot-feet/s?k=plant+pot+feet This is for reference, not to drum up more business for Amazon.
I've only got 1 big pot with an olive. I use some offcuts of wood about 6-8cm long 2cm wide 1 cm thick and the pot sits on 2 of them - 1 either side of the drainage hole. They're not long enough to be seen, so the pot just hovers 1cm above the patio They last a few years before needing to be replaced
Knowledge is knowing that a tomato is a fruit. Wisdom is not putting it in a fruit salad.
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I have bought the terracotta feet but that was a long time ago so no idea of the cost these days.
I use some offcuts of wood about 6-8cm long 2cm wide 1 cm thick and the pot sits on 2 of them - 1 either side of the drainage hole.
They're not long enough to be seen, so the pot just hovers 1cm above the patio
They last a few years before needing to be replaced
Wisdom is not putting it in a fruit salad.
But yes also easy enough to make some by reusing any suitable leftover materials.