1. A pair of reusable nipple pasties for anyone who dares to go braless no matter the season — these will allow you to wear your favorite tops and dresses without worrying about stubborn bra straps or piercings showing *or* a sudden drop in temperature. Lots of reviewers love that these nipple covers look seamless underneath clothing and stay put, no matter the occasion.

Promising review: "So I decided to put these to the ultimate test for Fourth of July underneath my white, semi-sheer swimsuit. I wore them out in the Florida heat in the ocean all day, and they did not budge or peel off. I thought for sure these would take skin off by the time I got home because I just couldn't believe they stayed on the entire day (humidity is real).

I was able to remove them with ease. I washed them with warm water and soap and let them dry, and the next day, they were super sticky, like they were brand new out of the package again. Buying these forever.

" — Marisa Get it from Amazon for $26.50+ (available in two sizes and five shades). BTW BuzzFeed Shopping editor Natalie Brown swears by these pasties! So make sure to read her Nippies review to learn more.

2. A set of Liquid I.V.

hydration packets — these electrolyte-rich additives help get (and keep) you hydrated even better than regular-degular water. It's just perfect for having in your purse the next time you brave the summer heat on an all-day excursion! And guess what? They are gluten-, soy-, and dairy-free! BuzzFeed Shopping wr.