ThermoFlask® Chug and Spout Lid O-Ring 2pk
Fits all ThermoFlask® Chug Lids and Spout Lids. Two O-Rings are included in the pack. One large O-Ring fits inside the lid while a smaller O-Ring fits in the drinking spout cap while also being BPA free.
O-Ring installation instructions
Note: This item ships via USPS First Class Mail. There is no package tracking.