5-Pack Silicone O-Ring Gaskets for Vacuum Flask Lids | 4.5 & 5.2cm
5-Pack Silicone O-Ring Gaskets for Vacuum Flask Lids | 4.5 & 5.2cm
Keep Your Drinks Sealed & Leak-Free
Say goodbye to drips and spills! These food-safe silicone O-ring gaskets are the perfect replacement seals for your vacuum flask, travel mug, or insulated cup lid. Whether your old gasket has cracked, stretched, or lost its grip, this 5-pack gives you everything you need to restore a like-new, airtight seal — no tools, no hassle.
Made in Mainland China.
Product Specifications
- Material: Premium food-safe silicone
- Color: White
- Compatible Lid Outer Diameters: 4.5 cm and 5.2 cm
- Package Contents: 5 × Silicone O-Ring Gaskets
- BPA-Free | Phthalate-Free | Latex-Free
Why You'll Love These Gaskets
- ✅ High-Quality Silicone: Durable, flexible, and odor-resistant — built to last through repeated use and washing cycles.
- ✅ Food Safe: Made from BPA-free, phthalate-free, and latex-free silicone so you can drink with complete confidence.
- ✅ Tool-Free Installation: Simply roll off the old gasket and snap the new one into place in seconds — no special equipment needed.
- ✅ Perfect Airtight Seal: Restores a snug, leak-proof fit to keep your hot drinks hot and your cold drinks cold.
- ✅ Great Value 5-Pack: Stock up and keep spares on hand for multiple cups or for gifting to fellow flask lovers.
- ✅ Wide Compatibility: Fits vacuum flask and insulated cup lids with an outer diameter of 4.5 cm or 5.2 cm.
How to Replace Your Gasket
- Remove the lid from your vacuum flask or insulated cup.
- Locate the old O-ring gasket seated in the groove of the lid.
- Roll or pull the old gasket off carefully.
- Stretch the new silicone O-ring over the rim and seat it firmly in the groove.
- Reattach the lid and enjoy a perfect, leak-free seal!
Compatibility Note
These gaskets are designed for insulated cup lids with an outer diameter of 4.5 cm or 5.2 cm. We recommend measuring your lid before purchasing. Sizes are hand-measured; minor variations of 1–2 mm may occur. Product color may appear slightly different on screen due to monitor calibration.
For more guidance on food-safe materials and drinkware safety standards, visit the FDA's food safety resources.
Frequently Asked Questions
Q: What sizes do these silicone O-ring gaskets fit?
A: These replacement gaskets are designed to fit vacuum flask and insulated cup lids with an outer diameter of 4.5 cm or 5.2 cm. Please measure the outer diameter of your lid before ordering to ensure a proper fit.
Q: Are these O-rings safe to use with hot beverages?
A: Yes! The gaskets are made from food-safe, BPA-free silicone that is heat-resistant and safe for contact with both hot and cold beverages. Silicone is widely recognized as a safe material for food and drink applications.
Q: How many gaskets come in the package?
A: Each order includes 5 silicone O-ring gaskets, giving you plenty of spares for multiple cups or future replacements.
Q: Do I need any tools to install these gaskets?
A: No tools are needed. Simply roll off the old gasket and pull the new silicone O-ring into the groove on your lid — it's quick and easy to do by hand.
Q: Can these gaskets be washed in the dishwasher?
A: These silicone gaskets are durable and easy to clean. Hand washing with warm soapy water is recommended to extend the life of the gaskets and maintain their elasticity. Always check the care instructions for your specific flask or cup.