What Hot Yoga Has Taught Me About Myself — And the Gear That Helps Me Push Through Even the Sweatiest Class

Yes, you want to stay hydrated during class, but you should make sure you've been drinking enough throughout the day before you head to the studio as well. The HidrateSpark Smart Water Bottle ($60) is connected to an app that helps you track your drinking habits. It periodically lights up to remind you that it's time to take that next gulp, and keeps you on track even during your busiest days.