Specialized Purist 22oz Water Bottles in a Clear color w/ clear "leak-proof" Watergate tops.
The Watergate top is the most advanced, no leak top on the market. A simple hands-free open and close heart valve: nothing to turn. The Purist technology used in the bottles shields the inside of the bottle from any bad taste, mold, or staining. Nothing sticks, so your bottle stays clean and your water tastes pure. No residual taste from previous drink mixes. No plastic taste. With Purist Technology your water or drink mix tastes as intended.
Read more about the quality of these bottles here: http://www.specializedwaterbottles.com/purist-technology