Class is almost back in session, which means long days and nights of studying await.

As back-to-school kicks into high gear, it’s important to stay hydrated. Remember, this busy season is a marathon, not a sprint.

According to Harvard Health, the average person needs four to six cups of water every day. This 32 oz jug gives you a head start.

I don’t know about you, but the sleek Hydro Flask Water Bottle inspires me to sip on water all day long. Plus, it’s 25% off on Amazon for a limited time.

The insulated, stainless steel design keeps drinks cold for up to 24 hours. Its Flex Straw Cap is also leakproof, so there’s no need to worry about storing it inside a backpack with your computer. Simply flip, sip and secure it closed when done.

The water maintains a clean taste, with no flavor transfer from the day prior.

The product comes in a variety of colors that are now on sale, including mermaid green, capri blue, supernova purple and tonal agave. You can also choose a different-sized flask, either 24 oz, 32 oz, 40 oz or 64 oz.

One Amazon shopper praised the water bottle for being “stylish and lead-free for the kiddos.”

“Great quality and size. We love the color on this one. Super-stoked to find an insulated, lead-free option for school,” they continued. “Fits in the car cup holder and keeps water cold. Acceptable value even if a bit more than I wanted to spend. Love the lid functionality.”

Another purchased one as a holiday present: “Got this as a Christmas gift for my uncle, and he loved it!! The color was so, so pretty and very portable. Keeps his water cold all day and doesn’t spill at all. Hydro Flasks last a VERY long time, so I would see this as an investment!”

Back-to-school books and folders are important — but so are water bottles. Ensure you stay energized during long study days with the Hydro Flask Water Bottle — now 25% off on Amazon.

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