3-Piece Silicone Tumbler Spill Stopper Set – 40oz & 30oz Lids

Keep Every Sip Mess-Free with This 3-Piece Silicone Tumbler Stopper Set

Tired of spills, splashes, and dust sneaking into your favorite tumbler? This 3-Piece Silicone Spill-Proof Stopper Set is the perfect upgrade for your Stanley-style or similarly designed tumblers. Compatible with Version 1.0 and 2.0, 40oz and 30oz tumblers, this kit includes three thoughtfully engineered silicone accessories that work together to keep your lid sealed, your straw secure, and your drink where it belongs — in the cup.

Made from food-grade, BPA-free silicone, the entire set is safe, reusable, and dishwasher friendly for effortless everyday use.

Made in Mainland China.

What's Included

• Straw Topper Cap — Features internal threading on the outer cover for a superior seal (unlike standard male-model caps on the market). Fits straws 0.6 cm–1 cm wide. The tip cap blocks liquid from dribbling out of the straw when not in use, and keeps dust and debris from entering.
• Round Leak-Proof Plug — Installs in the center of the lid's interior. Its cross-opening design allows air to flow in while drinking, making every sip smooth and effortless — no more vacuum resistance.
• Square Spill Stopper Seal — Fits into the straw hole of the lid to create a dual-function seal: it forms a leak-proof barrier and holds the straw firmly in place so it stays put whether you're commuting, hiking, or at your desk.

Key Features

• ✅ Compatible with tumbler lids Version 1.0 & 2.0 — 40oz & 30oz
• ✅ Food-Grade Silicone — BPA-free, safe for daily use
• ✅ Threaded Straw Cap — Better seal than standard market alternatives
• ✅ Cross-Opening Air Plug — Ensures easy, free-flowing sipping
• ✅ Dual-Purpose Square Seal — Leakproof + straw holder in one
• ✅ Dishwasher Safe & Reusable — Easy to clean, built to last
• ✅ No High-Concern Chemicals — Verified safe materials

Perfect For

Whether you're headed to the gym, the office, school, or on a road trip, this stopper set is the easy, affordable way to protect your tumbler lid from leaks, spills, and contaminants. It also makes a great small gift or replacement kit for anyone who relies on their favorite tumbler every day.

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Learn more: FDA food safety in the kitchen

Frequently Asked Questions

Q: What tumbler sizes and versions are these silicone spill stoppers compatible with?

A: This 3-piece silicone stopper set is specifically designed to be compatible with tumbler lid Version 1.0 and Version 2.0, fitting both 40oz and 30oz tumbler sizes. Always check that your lid version matches before purchasing.

Q: Is the silicone material safe for everyday use with beverages?

A: Yes! All three pieces are made from food-grade, BPA-free silicone with no high-concern chemicals. They are safe for contact with hot and cold beverages, reusable, and fully dishwasher safe for convenient cleaning.

Q: What straw diameter fits the straw topper cap?

A: The straw topper cap is designed to accommodate straws ranging from 0.6 cm to 1 cm in diameter, covering most standard and wide tumbler straws.

Q: How does the round leak-proof plug work without blocking airflow?

A: The round plug features a cross-opening design that seals the lid's interior while still allowing air to enter as you drink. This prevents vacuum suction, so liquid flows freely and smoothly every time you take a sip.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.