French Phrase
J'utilise des boîtes en plastique hermétiques.
Meaning
The sentence means “I use airtight plastic containers.” It emphasizes that the containers are both made of plastic and sealed tightly, which is useful for preserving food or keeping items fresh.
When to use
Use this phrase when you’re talking about kitchen habits, packing lunches, or describing how you store leftovers. It’s also handy in a grocery‑shopping context when you explain why you prefer certain containers.
✦Grammar Breakdown
J'utilisedesboîtesenplastiquehermétiques
Pronoun + verb contraction
The subject pronoun "je" contracts with the verb "utilise" to form "J'utilise" before a vowel or mute h.
Partitive article "des"
Used before a plural noun to indicate an indefinite quantity, similar to "some" in English.
Noun gender and plural
"boîte" is feminine; its plural form is "boîtes" with an added -s.
Prepositional phrase "en plastique"
The preposition "en" introduces the material something is made of; here it means "made of plastic".
Adjective agreement "hermétiques"
Adjectives agree in gender and number with the noun they modify; "hermétique" becomes "hermétiques" for plural feminine.
🗨In Conversation
J'utilise des boîtes en plastique hermétiques pour garder mes légumes frais.
I use airtight plastic containers to keep my vegetables fresh.
Bonne idée ! Elles sont pratiques et évitent le gaspillage.
Good idea! They’re convenient and help avoid waste.
✕Common Mistakes
J'utilise des boîte en plastique hermétique.
Missing plural -s on both the noun and adjective; adjectives must agree with the noun in number and gender.
J'utilise des boîtes en plastiques hermétiques.
The material "plastique" stays singular; do not add an -s when used after "en".
J'utilise des boîtes hermétiques en plastique.
While understandable, the more natural order in French places the material before the adjective: "en plastique hermétiques".
↔Alternatives
Je me sers de boîtes en plastique hermétiques.
I make use of airtight plastic containers.
J'utilise des contenants en plastique hermétiques.
I use airtight plastic containers.
J'opte pour des boîtes hermétiques en plastique.
I opt for airtight plastic boxes.
Cultural Tip
In France, many households prefer "boîtes hermétiques" for storing leftovers because they are reusable, reduce waste, and comply with the country's strong emphasis on sustainability. When speaking to older generations, you might hear the term "boîtes de conservation" instead of "hermétiques".