Love these!
"Solid quality. Very smooth and fits in mason jars very well. The hole is a good size cuz it can fit your thin straws and thicker smoothie straws too. I thought I’d miss the silicon “x” that’s in the hole of one of my other bamboo lids (it holds the straw in place like a seal), but actually I like it better without. It’s more satisfying to drop the straw in there, and if you get smoothie on your straw from stirring before putting the lid on, the smoothie doesn’t get caught on the silicon part as you put the straw in (super specific, I know)"