this is very cool, but it seems like you'd need to replace the liquid layer (globules) every now and then. the abstract says that it's "locked in place" by the

this is very cool, but it seems like you'd need to replace the liquid layer (globules) every now and then. the abstract says that it's "locked in place" by the teflon substrate, but the summary in the linked article characterizes the liquid as being "poured on". does anyone have more info? google isn't helping much ("SLIPS" is cute, but not so good for searching).