This is something that only you geniuses here can solve.
I once had ice cube making bags where you pour in water which flows into separate compartments. You then freeze them. Now, the crucial bit, you sort of squeezed them a bit and internal perforations split and the internal walls collapsed leaving the frozen cubes in the outer skin. A very convenient way of making/storing.
I can only find ones where you have to break off each cube messily leaving bits of plastic everywhere.
Does anyone know what my ideal ones are called or even home to search for them? I've tried verbose searches and only come up with these:
https://www.lakeland.co.uk/10942/lakeland-ice-cube-bags-x-50 (view full product description)
typically discontinued!
Cheers.