I've been using my Twist N Sip straw lid for a few weeks now and I'm loving it! I like that the one product is customizable to your bottle with a handy ruler on the packaging to show where to cut for what size bottle you have. I also like that it comes with 2 straws so I can use it on both my 32oz and 16oz by switching the straws! A quick twist of the lid and you get your straw. I've used it while almost laying down flat in bed and haven't spilled yet! I do have an ever so slightly harder time putting the lid on and making sure the threads line up, but that's mostly when I'm in a hurry!