The Ninja Slushi makes vacation-worthy frozen drinks, and I highly recommend it (especially on sale)

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Save $90 : The Ninja Slushi 88 oz machine is on sale for $260 (that's 26% off and $90 savings) at Amazon and Walmart . This is the best price we've seen the Ninja Slushi sell for since Prime Day in June, where it dropped to its lowest ever price of $200.

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I've had the chance to test the Ninja Slushi for several months, and it's been an impressive upgrade to my kitchen appliance repertoire. While it's certainly not a necessity, it's fun and easy to use, and can turn nearly any drink into a frozen treat in under 30 minutes.

The Ninja Slushi previously sold out at multiple retailers while it was last on sale for Prime Day, so don't wait too long if you're considering this machine for frosty fun the rest of the summer -- the savings (or the stock) may be gone soon.

There are a few different capacity options for the Ninja Slushi, spanning from 72 to 150 ounces. I tested the Slushi Max model, which has a maximum liquid fill capacity of 112 oz. The Max model shares most major features with the smaller-capacity options, but it also features Ninja's SlushAssist system, which automatically adjusts temperature for the perfect slush, depending on your liquid of choice, and a few more advanced settings.