also: エサばこ
noun
feed tray; feed trough; feed box; feed bowl; bait box
A container for animal feed or fishing bait. Covers various shapes: trays, troughs, boxes, and bowls.
鶏の餌箱に餌を入れた。
I put feed in the chicken feed tray.
釣りに行く前に餌箱を準備した。
I prepared the bait box before going fishing.
Compound of 餌 (esa, 'feed, bait') + 箱 (hako, 'box'). The reading えさばこ is a straightforward combination with rendaku on 箱.