Xyptorix 16 oz Wide Mouth Mason Jars with Airtight Lids-Over

The Verdict

Skip the flimsy plastic containers and the overpriced “overnight oat jars” sold as specialty gear. The Xyptorix 16 oz wide mouth mason jars with airtight lids do what mason jars should: hold food, seal tight, and survive the chaos of a real kitchen. At 4.5 stars from 225 raters, these aren’t perfect—but for the price, they’re a serious contender.

What you actually get
The set includes six 16 oz jars with matching black plastic lids. Each jar measures roughly 5.5 inches tall with a 3-inch wide mouth opening—that’s the standard canning-jar size, so your existing funnel, ladle, or reusable straw fits. The glass is soda-lime, not borosilicate, which means it’s heavier and less thermal-shock resistant than lab-grade glass. But it’s thick enough to feel substantial in hand, and the wide mouth makes scooping chia pudding or layering yogurt parfaits genuinely easier than narrow-neck alternatives.

The seal is the star
I tested these lids with water first—filled a jar, screwed the lid hand-tight, and shook it like a bartender making a martini. Zero leaks. Then I filled one with leftover curry and tossed it in my work bag on a 20-minute commute, upside down. Still dry. The silicone gasket inside the lid is the key; it compresses evenly against the glass rim without needing the brute force that metal canning lids require. One buyer noted, “I’ve left these in my gym bag with protein shakes and never had a drop escape—my backpack thanks me.” That tracks with my testing.

Build quality and real-world use
The glass is thick—noticeably heavier than Ball or Kerr jars of the same size. That’s a pro if you want durable storage, a con if you’re counting grams in a backpack. The plastic lids are BPA-free but they’re not meant for high heat. I ran one through the top rack of my dishwasher once and it came out slightly warped; the seal still worked, but it didn’t screw on as smoothly afterward. Hand-wash the lids and they’ll last. The jars themselves are dishwasher-safe, but I’d recommend letting them cool completely before rinsing with cold water—thermal shock is real with this glass type.

Where it falls short
No measurement markings on the side. For someone meal-prepping overnight oats with exact ratios, that’s a minor annoyance—you’ll need a separate measuring cup. The plastic lids also don’t create an airtight vacuum like metal canning lids do, so this isn’t for long-term pantry storage or fermentation. It’s for fridge storage, smoothies, salads, and desk snacks. At 16 oz, it’s the perfect single-serving size for overnight oats, dressings, or chopped fruit—but don’t expect to store a full soup portion.

Who should buy this

• Meal-preppers who want leak-proof, single-serving containers for wet or saucy foods.
• Smoothie and shake drinkers who are tired of cracked plastic bottles.
• Home canners who need backup jars for fridge pickles or jam—just swap in metal lids for actual water-bath canning.
• Parents packing school lunches with yogurt, apple slices, or dips.

Skip it if

• You need jars for long-term shelf storage or pressure canning—plastic lids won’t seal vacuum-tight.
• You’re looking for lightweight, backpack-optimized containers—these are heavy glass.
• You hate hand-washing lids—this will annoy you.

FAQ
Q: Are these lids truly airtight?
A: Yes, for practical purposes—they’re water-tight and won’t leak in a bag or fridge. They don’t form a vacuum seal, so don’t expect the “pop” of a metal canning lid.

Q: Can I use these for hot liquids?
A: Not recommended. The plastic lids warp above 160°F, and the glass can crack if you pour boiling water in while it’s cold. Let liquids cool to room temperature first.

Q: Do they fit standard mason jar accessories?
A: Yes. The 3-inch wide mouth fits regular wide-mouth lids, funnels, and pour spouts. You can buy metal canning lids separately if you need them.

The Verdict
Buy it if you want reliable, leak-proof glass jars for fridge storage, meal prep, and on-the-go eating. The seal genuinely works, the wide mouth is practical, and the glass survives real life.

Skip it if you need vacuum sealing, dishwasher-safe lids, or measured markings—look elsewhere.

Rating: 4.6/5 — Solid, honest jars with one standout feature (the lid) and one real weakness (plastic material). For the price, they’re a smart buy.

Where to Buy

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Last updated: 2026-08-06. Ratings and prices current as of review date. Verify on Amazon before purchasing.