I don't use it.
Everything is always so dusty.
My prefers this cup, however less than a year later and he has chewed and destroyed the straw. It has been difficult to find a replacement to purchase. I’m still looking.
Good News! We sell replacement straws for the ezpz Cup + Straw systems. The sage straw for the mini cup is here https://shop.hipmommies.ca/products/ezpz-mini-cup-straw-training-system-straw-replacement-2-pack-sage
Have purchased multiple gathre products, they make great gifts especially for those who already have everything.