I have used these since day 1. They have been super. I love how small they are and LOVE how they just fit into the bottle and you can just pour it right in. They are a must have for formula babies.
I love these dispensers! It is so convenient being able to carry around one bottle with both the water and powder inside, instead of two separate containers. I also love knowing that nothing is going to leak in my bag! Everyone who has seen me put a bottle together is impressed at how easy and thoughtful this system is. I adore the whole Tommee Tippee lineup, and how everything goes together so seamlessly. Definitely worth it.