Thick silicone material, completely spill proof, only a little difficult to remove after putting on lid and to drink out of cup...  Read More

Thick silicone material, completely spill proof, only a little difficult to remove after putting on lid and to drink out of cup bc of no airflow but overall v good  Read Less

The sleeve at the bottom keeps it sturdy and upright.

The sleeve at the bottom keeps it sturdy and upright.  Read Less

I put on all of the accessories and even when held upside down, the cup doesn’t leak at all!

I put on all of the accessories and even when held upside down, the cup doesn’t leak at all!  Read Less

I love my stanley but man did it leak every single time it was moved or jostled.

I love my stanley but man did it leak every single time it was moved or jostled.  Read Less

Perfect and at a fraction of the cost.

Perfect and at a fraction of the cost.  Read Less

Such a good price for a major difference in the functionality of the cup!

Such a good price for a major difference in the functionality of the cup!  Read Less

I value the leakproof option way more than the barely noticeable gap between the orange rectangle and the lid so it doesn’t bother me.

I value the leakproof option way more than the barely noticeable gap between the orange rectangle and the lid so it doesn’t bother me.  Read Less

I also tried it on other brands and they fit well.

I also tried it on other brands and they fit well.  Read Less