The stopper is consumable part. Check once a year for damage/deterioration.
If heavily stained or loose, replace it.

For replacement parts, contact customer service or the shop where you purchased this product.

TIGER CORPORATION HONG KONG LIMITED

Rm.1006B, 10/FI., Join-in Hang Sing Centre, 71 - 75 Container Port Road, Kwai Chung, N.T.
Tel:(852)2418-0912
Fax:(852)2418-0911
URL:https://tiger-corporation.hk

TIGER CORPORATION U.S.A.

1815 W 205th Street, Unit 106, Torrance, CA 90501
Tel:1-866-55-TIGER(84437)
Email:support@japantigercorp.com
URL:https://www.tiger-corporation.com/en/usa

TIGER CORPORATION

Head Office:3-1, Hayamicho, Kadoma shi, Osaka, 571-8571, Japan