The bottle is very good and does not leak if you place the rubber correctly (in fact, it doesn't even spill a drop). The rubber comes off easily for easy cleaning. The reason I am deducting one star is that after 12 months of drops and such, I see that it has filled with cracks (we had 3 and 2 of them filled). We used it from the age of 8-20 months.

While it is very beautiful, it does leak water from somewhere, and of course, my little one may have broken it with all the times she dropped it! However, the straw is very convenient because it drinks water no matter how she holds it, and even though she didn't want it at first, I gave it to her daily until she learned to drink with the straw!