Purchased the 12 oz size for a yeti rambler 12 oz with hot shot cap. This fits perfectly and compliments the color of the cup. My cup still fits in my car’s cup holders with the boot in place. The boot is attractive, and I love both the design and the charitable donation associated with this purchase.
The boot seems durable, but I am concerned that the pattern may eventually wear off. For now, it keeps the bottom of my cup protected, and no more clinking noise every time I set the cup down during meetings.