Dd has put one (and a new phone case) on her Christmas list, I’d not heard of them before. I know from google it’s a door knob thing for your mobile phone, but am confused as to what I should buy. Firstly do I need to buy a particular type of case that a popsocket will work with? I think her current phone case is a silicone one. Secondly the price online varies quite a lot. There are some cheap (£7) ones on Amazon or some for £25, which seems a lot for a plastic knob - are they the same thing?