I have been trying to get my little one to use sippy cups since she was one and all she does is finds ways to get the water out of them, whether it’s squeezing the tip while turning it upside down, or putting pressure on the tip while holding it upside down.... she always makes a mess! Here is what we have tried so far with no success:

Any suggestions on what has worked well for you? I am so tired of buying so many sippy cups for her to just make a mess with