Supermarket Scenics - Pressurised gas tanks

Sainsburys has now introduced a line of sweeteners which come in box things similar to those Safeway used to do. If they are the same two of the clip-off ends trimmed and glued together make a rather good pressurised gas tank with a domed end. The Safeways ones were nicely scaled to suit both N and OO (the small and large packs), so far only seen the smaller type at Sainsburys. Flat-top push-off aerosol caps seem to have gone though, pinch any you still have lurking on tins at home, handy as 'fuel tanks' in most smaller scales.