This is quite exciting in that it removes plastic waste. I see no reason why different companies can’t make different shape ones to maintain their lock-in. I expect a knock-off market to pop-up, but that exists with plastic pods too. It’s a step in the right direction at least.
I think I’ve only seen these in France, which is crazy because it’s such a simple and elegant solution to this “problem”.
Senseo is everywhere in the EU. Personally, I rank it below homemade filter coffee though.