The first JAXX shaker I purchased would easily fall out of the sleeve. I returned the first the day after I purchased it without using it. The one I traded for fit in the rubber sleeve tightly but after a couple uses the lid is absolute garbage. It doesn't stay closed, the fit on it was never great. Now it pops up randomly, causing me to spill my precious protein at times. If you do purchase this product please hold the lid tightly or prepare to get messy.(not at all worth the money)