Yeti Magslider LIDS are sized for mugs, glasses, low-ball cups, etc. It prevents splashes and helps prevent heat or cold from escaping when you drink coffee, tea, or milk with the bottles.
However, the lids are various. Below are some of the mugs' lids.
It is better to choose the lids according to your tumbler diameter. Our mug & tumbler lids are also different from each other.
Most people choose the lids with a sealing function, so they can take the tumbler outside conveniently.
And the lid can help keep the beverage cold & hot anyway.
If you want to know more info about water bottles and lids. Pls message me.