noun which may take the genitive case particle 'no', na-adjective, noun
economical; good value
Describes something that offers a good quantity or quality for the price, often used for larger packages or bulk purchases.
この洗剤は徳用サイズを買うとお得です。
This detergent is a good deal if you buy the economy size.
徳用パックの方が割安だ。
The economy pack is more economical.
noun
economy size; family size
Refers specifically to a larger, more economical package size, especially for food and household goods. Often used with the honorific prefix お (お徳用).
お徳用の醤油を買ってきた。
I bought a family-size soy sauce.
このお菓子は徳用袋が人気です。
The economy bag of these snacks is popular.
Compound of 徳 (profit, benefit) and 用 (use, purpose). The spelling 得用 is a variant using the character 得 (gain, profit).