Leak-Proof storage with a premium silicone seal

Tidy, spill-free jar storage starts with a reliable seal. The Mason Jar Lifestyle platinum silicone lid inserts are designed for wide-mouth jars, delivering a snug, reusable solution that helps keep contents fresh in the fridge, freezer, or on the go. Crafted from platinum-cured silicone, these discs are BPA-free and plastic-free, offering a high-purity option that won’t leach harsh materials into foods. They’re also dishwasher, freezer, and microwave safe, making everyday use more convenient without sacrificing safety.

Why choose platinum silicone lid inserts

• Platinum-cured silicone provides high purity and a durable, food-safe seal that lasts.
• BPA-free and plastic-free construction helps minimize chemical exposure in daily storage.
• Dishwasher, freezer, and microwave safe for versatile handling.
• Leak-proof, airtight design improves storage confidence for leftovers, sauces, and snacks.
• Flexible, easy to trim if needed and compatible with a range of lids (not all lids are perfect fits).
• New small tab enhances removal without fuss, reducing spill risk during lid changes.
• Not for canning — designed to complement wide-mouth lids and jars, not for pressure canning processes.

Smart, real-life uses

• Fridge and freezer storage: keeps foods fresh and contained without contact with metal lids.
• Transport and on-the-go meals: line a lid to prevent leaks in bags or totes.
• Replace rusted metal flat lids and craft-friendly lining for candles or food jars.
• Line different lid types for a consistent seal across your Mason jars and compatible lids.

What you get and how to use

The set includes 10 reusable platinum silicone discs designed for wide-mouth jars (3" internal diameter, approximately 3.3 mm thick). They work with Mason Jar Lifestyle stainless steel lids, Ball plastic lids, and some other wide-mouth lids for a secure, leak-resistant seal. If a disc feels a touch large, you can trim it with scissors for a closer fit. For best results, ensure the jar and lid surfaces are clean before application.

From a Colorado-based family business, these inserts come with trusted customer support and a focus on helpful, thoughtful design. They represent a practical way to reduce plastic contact while expanding how you store, transport, and organize foods and small essentials.