Only type of sippy cup I have in my house! They are incredibly tough and mess free. Granted, if your child decides to chuck them they will splatter a bit but never a real spill. I also love how minimalist the parts of the sippy cup are. Super easy to keep clean and dishwasher safe. I had to many sippy cups end up with mold because you couldn't really clean all the special no spill parts. These crush all other sippy cups on the market.