Noun suffix used to form compound nouns meaning a device or machine that makes something, e.g. アイスクリーム作り器 (ice cream maker).
This bread maker is very convenient.
I bought a new yogurt maker.
Standard kanji spelling for the suffix meaning '-maker'.
Alternate kanji spelling; 機 suggests a machine or device.
Compound of 作り (tsukuri, 'making') + 器 (ki, 'device').