大脇差 (おおわきざし); 利休 had one like this from Ki-Seto

差替, which is the same but smaller

棒の先 (ぼうのさき), which is a bit elongated, quite elegant

槍の鞘, a spear sheath (kensui_futaoki.pdf

瓢箪, shaped like a gourd. These three are handled differently, because the 蓋置 cannot be placed at the bottom.

鉄盥, a 平建水

餌畚, the falconer's feeding sack that is so famous today.

It's never wet (Hiromi 22)

It's the only one that turns (Miya 24). Even if other 建水 have a clear front, with some writing etc., that front will face you.