"You should buy the fancy expensive ones with bubbles on the heels.."

I dunno about that. Are these bubbles filled with fluid?

I once bought a pair that had insoles with fluid in them. The idea was that it would yield or cushion. I wore them on a short hike (maybe half a mile) and had never had such pain in my feet before. I made my way back to the nature center, and my husband had to go to the car and get other shoes for me.

I wrote the company, but they never wrote back.
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I have secretly longed to wear shoes with flickering lights. But if they don't work for very long, I don't suppose they are worth wishing for.