In an advanced physics class.
Ice Sliding Off a Bowl: When Does It Leave the Surface?
A small block of ice is placed on the top of an inverted spherical bowl. The ice is then given a slight nudge so that is slides down the side of the bowl. At some point, the ice will speed up enough to leave the bowl. At what angle does this happen?
If the ice bottom conforms to the inverted bowl shape, surface tension and capillarity plus water tensile strength will adhere the ice all the way down. Rain-X the silicate bowl or use a polyolefin bowl, neither of which will wet.
Engineering is about bulk not surface. The first ~300 nm or less is as much as the contacted world sees. Microtexture, gelled hydration, Helmholtz layer, lubrication… and the interior can be cheap.