bucket baby
n.— «Some studies have shown that sling-carried babies are more intelligent than bucket babies (nickname for how when a baby is carried around in the popular car seat carriers it looks like the parent is carrying around a baby in a bucket). The theory is that sling babies spend less time crying and more time learning.» —“Babywearing” PregnancyCrawler Mar. 15, 2004. (source: Double-Tongued Dictionary)