HYRROFLASK HYDROFLASK HYDROFLASK HYDROFLASK!!
I was never preppy, but I was a former VSCO girl, and I still have had the same HydroFlask for like, 5 or 6 years. AND HOLY COW, I love my HydroFlask still, and they also come in super cute colors!
Also, Stanleys are heavy, and you can't just stuff them in your backpack. They're stupid, and I can't think of a single thing that makes them better than HydroFlasks.