Sainsbury's own brand food flasksI bought 2. one functions as expected - cold surface, when containing superheated soup, remains hot for hours.the 2nd flask doesn't function as expected - warm surface, when containing superheated soup, Does not remain hot for hours, not even warm.visibly the flasks are identical, they even weigh more or less the same. so why the difference in effectiveness?
Sainsbury's own brand food flasks
ReplyDeleteI bought 2. one functions as expected - cold surface, when containing superheated soup, remains hot for hours.
the 2nd flask doesn't function as expected - warm surface, when containing superheated soup, Does not remain hot for hours, not even warm.
visibly the flasks are identical, they even weigh more or less the same. so why the difference in effectiveness?