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.