Fourth of July is coming up, and that means backyard barbecues, trips to the lake, and long-weekend sales. A number of companies are already offering discounts ahead of the holiday, including Hydro Flask, which is knocking 25 percent off prices across its website through the Fourth. Now is the time to get water bottles, coolers, and other products to keep your food and drink cold all summer. Oh, and everything Hydro Flask sells comes with a lifetime guarantee, so don't be afraid to splurge. Here are five things we're buying (and one bonus).

1. National Parks-Themed Water Bottle; $30

Hydro Flask

With designs inspired by the Great Smoky Mountains, the Grand Canyon, and Olympic National Park, these water bottles are the perfect companion for summer adventures. Stay hydrated while hiking or simply park one on your desk and stare at it whenever you wish you could be in the great outdoors rather than in the office. Like all Hydro Flask bottles, the National Park bottles feature double-walled vacuum insulation that keeps drinks cold for up to 24 hours or hot for up to 12 hours. They're available in 21-ounce and 32-ounce versions (though the latter is currently out of stock). There are also designs honoring Yellowstone and Joshua Tree, but they seem to be sold out right now on the Hydro Flask website. (You can get them in both sizes from REI, though, which is also offering deals for the Fourth of July.)

Buy it here.

2. Tumbler; $16 to $30

Hydro Flask

Available in 12 different colors (some of which are available at an even steeper discount) and two sizes, Hydro Flask's insulated tumblers are an eco-friendly choice for your beverages year-round. They'll keep your hot coffee warm for six hours or your iced coffee cold for up to 24 hours. The 22-ounce and 32-ounce tumblers are narrow enough to fit comfortably in the hand or a cupholder, but have enough capacity to keep you caffeinated all day. (They're also great for frozen drinks.) The tumblers come with a sip-through lid, but you can also get a straw lid as an add-on.

Buy it here.

3. Cooler Backpack; $169 to $206

Hydro Flask

Whether you're hauling beers to the beach or frozen vegetables home from the grocery store, the Unbound soft cooler packs—available in 15-liter or 22-liter sizes—provide a watertight, hands-free way to keep things cool. Weighing less than 3 pounds, its lightweight insulation is designed to keep contents cold for 48 hours, so you don't have to worry about melted ice cream or hot cans of soda.

Buy it here.

4. Cooler Cup; $19

Hydro Flask

Hydro Flask's new Cooler Cup does double duty as both a travel cup and a can/bottle cooler. The 12-ounce insulated cup features a removable sleeve that locks in cans or bottles to become the perfect koozie, or you can insert a tumbler lid (the 10-ounce wine tumbler lid fits perfectly) and use it to take a beverage on the go. It would make an excellent addition to any backyard barbecue or summer picnic.

Buy it here.

5. Food Flask; $22 to $26

Hydro Flask

Give yourself an airtight reason to pack your own lunch. These 12-ounce and 18-ounce stainless steel food flasks can keep your lunch at the perfect temperature for up to four hours. The screw-top lids won't spill in your bag, either.

Buy it here.

Shop the full sale at HydroFlask.com through July 4. Use the code COLDH20 at checkout for 20 percent off and free shipping.

6. Not on Sale, But We Still Recommend It: Hydration Backpack; $165 to $200

Hydro Flask

For adventures that require more than one water bottle, Hydro Flask recently debuted a line of hydration packs that are an elegant, compact upgrade to your average CamelBak—though you can't get them quite as cheap. Unfortunately, the Journey Series hydration packs aren't included in the otherwise site-wide sale right now, but as long as you've got free shipping, you might one to consider one anyway. Unlike most hydration backpacks, you don't have to worry about your water getting warm with the Hydro Flask version—the company's new Cold Flow technology uses an insulated reservoir and a neoprene sleeve to keep your water cold for four-plus hours. A back panel that holds your bag slightly above your back prevents heat from transferring from your body, even when you're working up a sweat. It's perfect for long bike rides—get the 10-liter version if you're mostly looking to carry water and a few snacks and supplies, or the 20-liter version if you want more space.

Buy it here.

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