40. HidrateSpark 2.0 smart water bottle by HidrateSpark
When you’re out in the woods and removed from your usual routine, it can be easy to forget about hydration—until, that is, you’re dying of thirst on a five-mile hike. The 24-oz HidrateSpark 2.0 aims to solve this problem by tracking your water intake, and then reporting your stats back to your smartphone or your fitness tracker (it works with Fitbits, the Apple’s Health Kit, and Under Armour’s MyFitnessPal tech). The HidrateSpark 2.0 even glows when you’re due for a sip. ($54.95, hidratespark.com)
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