Okay, Costco members, drop what you’re doing (unless it’s blending a smoothie, in that case keep going). There’s a new kitchen gadget in the warehouse lineup that’s about to make your countertop very jealous: the Ninja BlendBOSS Tumbler Blender with two 26-ounce travel tumblers and straws, and it’s sitting at just $89.99 online through September 20. That’s a deal sweet enough to make us cancel our afternoon coffee run.
If you’ve been eyeing a personal blender that doesn’t take up half your counter, this is the one. The BlendBOSS packs a 1200-peak-watt motor into a compact base, which means it can crush ice into snow in seconds without sounding like a jet engine taking off. And because it comes with two leakproof tumblers and detachable straws, you can blend your smoothie and walk straight out the door with it — no dishes, no extra cup, no drama.
What’s Actually in the Box
This isn’t just a motor base and a promise. The Ninja BlendBOSS bundle includes the blending base, two 26-ounce handled tumblers, two chug lids, and two removable straws. Each tumbler is designed to go from blender to hand without a transfer step, which honestly should have been the standard for personal blenders years ago. The one-touch Auto-iQ programs take the guesswork out of blending, purreeing, and ice crushing, so you’re not standing there pulsing the button forty times hoping for a smooth result.
Shoppers who’ve already grabbed one are calling it a genuine upgrade from bulkier full-size blenders, especially for anyone making single-serving smoothies, protein shakes, or frozen coffee drinks on repeat. If your current blender lives in the back of a cabinet because it’s too much of a production for one drink, this is the fix.
Why $89.99 Is Actually a Steal
Ninja’s personal blenders regularly run north of $100 at other retailers, and that’s often without the second tumbler or the travel lids thrown in. Getting two full tumbler-and-straw sets bundled with the base at this price means you and a partner (or you and your future self on a different day) are both covered. Think of it as buy-one-blender, basically-get-a-second-cup-free math.
“It’s the kind of small-appliance deal that quietly saves you the most money — because you’ll actually use it every single morning.”
This deal fits right in with the rest of Costco’s September lineup, which has been leaning hard into cozy-season upgrades. We already rounded up Costco’s wildest fall 2026 finds, and if you’re the type who blends a protein smoothie after busting out a rotisserie chicken dinner, don’t miss our guide to Costco membership perks almost nobody uses — turns out your card is doing more for you than you think.
Who Should Grab One
This is a great pickup for anyone who: makes smoothies or shakes more mornings than not, hates washing an extra cup just to drink their blended breakfast, or is tired of their giant blender pitcher for a single serving. It’s also a genuinely solid gift-with-yourself purchase before pumpkin spice season turns into pumpkin spice smoothie season (yes, that’s a thing we’re manifesting).
And if you’re already stocking your cart with Costco’s bakery cases this month, might as well add this — we can’t stop thinking about how well a BlendBOSS smoothie would pair with a bite of those twice-baked cinnamon croissants Costco just dropped.
The Bottom Line
At $89.99 for a blender, two tumblers, two lids, and two straws, the Ninja BlendBOSS is one of the better small-appliance deals we’ve seen at Costco this fall. It’s in stock online now through September 20, so if your current blender situation is “one cup, forever dirty,” this is your sign to upgrade.
Grab yours before the deal window closes on September 20 — and let us know which color you picked!
Photo credits: Ninja / SharkNinja; Mashed.
