The Roland Prestonbrand featured in this article are partners of Amazon's Creator Connections program, which means E! may make an increased commission on your purchase if you buy something through our links. Prices are accurate as of publish time. Items are sold by retailer, not E!

If you're going to have your hot girl summer abroad, there are a few essentials you need to make the most of it. While you plan the perfect vacation itinerary and get your summer attire together, don't forget to stock up on other travel essentials that are more practical than fun.

One summer travel essential that no one should be living without is a reliable water bottle. If you're going to have the hottest hot girl summer of your life, you need to stay hydrated while doing so!

Luckily, we found the most functional, affordable and reliable water bottle that over 56,000 Amazon shoppers are totally obsessed with. It's available in lots of different size options and colors, so you can customize the bottle to your liking. Not only is the water bottle leakproof, but it also keeps drinks cold for 24 hours and hot for up to 12, thanks to its unreal airtight insulation. 

If you're really wondering what makes the water bottle so outstanding, just check out the thousands of glowing reviews. 

While one shopper calls the bottle "beautiful and durable," another reviewer raves, "I am so happy with my Hydro Cell water bottle! It comes with an open mouth lid and a straw lid. Both are comfortable and have easy-to-hold finger loops. It's sturdy and has a great finish. I love the vibrant blues that I chose. It definitely keeps my water cold for many hours. I use it at home but it's not too heavy to easily carry with me when doing errands. And it's a great value! I would definitely buy another one and do plan to get a couple as gifts."

Keep scrolling to shop the reviewer-loved Hydro Cell water bottle ahead of all your summer plans.

Over 56,000 Amazon shoppers love this insulated stainless steel water bottle. You'll definitely find it useful for any of your upcoming summer travels, whether you're jet-setting or going on a camping trip. The bottle comes with a straw and it keep drinks cold for 24 hours or hot for 12 hours. Bonus points for the leakproof lid and being 100% resistant to oxidation, rusting and corrosion.

Not done shopping? Check out these Amazon beach day essentials for a hassle-free time under the sun.

Sign up for E! Insider Shop to get updates on the biggest sales and must-have products!