Camelbaks are awesome! I have the groove one with the filter inside of the straw. Its really convenient. I highly recommend it!
And congrats on the weight loss! I haven't been weighing myself either but I've been keeping track of my measurements. I feel like it's a better way for me because its easier to see the transformation that my body is taking as opposed to just looking at the scale. I weighed myself in January and I'll do it again when I go home this weekend, but I'm really much less concerned with the numbers on the scale.