Leakproof Cover: Our bamboo bottle caps are made of high-quality materials and are equipped with a removable silicone ring underneath, which can prevent your jars from warping and form an airtight seal, sturdy, durable and leak-proof, helping your jars stay fresh.
Compatible Model: These tank storage lids are compatible with most ordinary mouth mason jars and wide mouth mason jars. They can also use water cups and food storage tanks.
How to Avoid Mold:
1. Clean the lid after use.
2. Do not use water higher than 86 degrees.
3. When not in use, do not store any liquid in a glass bottle.
4. Not suitable for preservation or immersion in water.
Wide mouth: about 3.39x 3.39 x 0.75 inches
Ordinary mouth: about 2.76 x 2.76 x 0.75 inches
Color: as picture shown