The Boston Marathon Was My First Race — These Training Essentials Made All the Difference

Hydro Flask Travel Tumbler ($50)

I swear, it's all about the water bottle when it comes to staying hydrated — and for some reason, my Hydro Flask (especially in this fun colorway) seriously motivates me to drink more water. It's insulated to keep your drinks nice and cold, and the straw is flexible — aka, if you're lying down after a long run and need to hydrate, this straw will work with you, not against you.