I travel quite a bit for work, and like to take my own shampoo and conditioner and lotion with me. I've used other products, like the Nalgene bottles available at Container Store, and they worked. But they were never quite right for me. These bottles are everything they say they are - leakproof, easy, decent size for travel. They actually have a 3 ounce size, unlike Nalgene.
If you travel at all, and like to take your own toiletries with you, these bottles are a must-have.