Fetching details from the dictionary...
wooden carrying box
岡持ちに料理を入れて運んだ。
I put food in a carrying box and delivered it.
出前の岡持ちが店先に並んでいた。
Delivery carrying boxes lined up in front of the shop.
蕎麦屋は岡持ちで配達する。
The soba shop delivers using a carrying box.