Take this product called Produkt, from that well known purveyor of Billy bookcase.
Plonk it into warm milk and switch it on to make frothy milk for latte coffee.
The bulky mains powered fancy machine I'd used previously took 2 minutes, required a teflon interior coating and a complete overhaul after every use. This takes about 10 seconds and then a quick dunk in some water.
And all for £1.
Oh yes. Even if the instructions were in Norwegian.