The sippy cups

Let me tell you, sippy cups are not what they seem. They seem to be the "fix" for avoiding a spilled drink. Not true. They leak. And they leak a lot!! Not matter the brand, no matter how dry the seal, no matter how tightly or losely you apply the lid, they leak. Those with valves leak, obviously those without valves leak and I am going mad trying to make them leak proof.
The best solution I have is to use a Playtex cup with a valve and try hard to keep it upright. The Munchkin cups, even new ones ALWAYS leak.
Straw cups are even worse. This is a no win situation, unless you know something that I don't? I thank you and so does our new, once unblemished couch.