eBay

silica gel
Premium Material: This straw lid attachment is made of silicone, it offers a more perfect fit compared to hard plastic. Not easy to break and deform. You can use it with confidence. Supports straws with a maximum diameter of 0.5in/1.2cm. Because of the different sizes of straws that fit you, this item will not be spill-proof.
Product Included: You will receive 2 pieces straw cover attachment for Yeti Tumber, which can make the straw less likely to fall. (Please note that our product is not sponsored or endorsed by, or affiliated with the brands it fits, including Yeti Tumber)
Special Design: This straw lid attachment is a straw attachment specially designed for Yeti Tumber, suitable for 20/30oz, to help you secure the straw so that it does not fall easily.
Product Size: The size of the straw lid attachment is 2.1in/5.3cm in length, 1.3in/3.3cm in width, and 0.5in/1.2cm in internal diameter.
Easy to Use: Just replace the old lid, change it with the new straw attachment, then you can use. Provide you a lot of confidence.

Specification:
Color: black
Material: silica gel
Product Size:diameter 0.5in/1.2cm
Package details:
2 x straw lid attachment
Note:
Due to manual measurement, the size and weight may have a certain error.
Due to the difference between monitors, there may be a slight color difference.