Costco’s “What’s New” aisle is packed with December arrivals that speak directly to how you shop now, from pantry staples and sustainable dairy to high-tech gadgets and family essentials. These 11 must-grab Costco finds combine value pricing with upgraded formulas, smart features, and seasonal exclusives that Shoppers are already scanning for on every visit. Use this guide to zero in on the Kirkland Signature standouts and curated brands that justify a special trip before the month’s hottest inventory rotates out.
1) Kirkland Signature Organic Ground Coffee
Kirkland Signature Organic Ground Coffee is one of the clearest wins in the December “What’s New” aisle, arriving in a 48 oz bag priced at $13.99 according to Costco’s December product update. That size and price point position it as a bulk-friendly option for daily drinkers who want organic beans without boutique markups. Because it carries the Kirkland Signature label, it also fits neatly into the pattern of private-label bags that regular Shoppers already recognize as reliable value plays across the coffee shelf.
For anyone brewing multiple pots a day or stocking an office, the 48 oz format reduces how often you need to restock, which matters when you are planning a single big Costco run. The organic certification also aligns with the broader trend of members looking for cleaner pantry basics that still come in warehouse sizes. In the context of December entertaining, this bag makes it easier to keep guests caffeinated without constantly recalculating cost per cup.
2) Kirkland Signature Milk Chocolate Covered Almonds
Kirkland Signature Milk Chocolate Covered Almonds are debuting in December in a 2.5 lb bag at $11.99, highlighted in a seasonal rotation overview that tracks new arrivals. That combination of size and price is tailored to holiday snacking, where you want a bowl that stays full through movie nights and gatherings. The Kirkland Signature branding signals that Costco is treating this as a core seasonal treat, not a one-off novelty, which matters if you plan to build repeatable dessert boards or gift baskets.
Because the almonds are coated in milk chocolate rather than darker, more bitter styles, they appeal to a wide range of palates, from kids to adults who prefer classic candy flavors. The 2.5 lb bag also fits the pattern of bulk sweets that Shoppers often highlight as must-buy finds when they share what is new at Costco. For hosts, the value here is straightforward: you can fill multiple serving dishes or portion out small gift bags without blowing the snack budget.
3) Yummly Smart Meat Thermometer
The Yummly Smart Meat Thermometer is landing in the “What’s New” section at $39.99, with Costco’s holiday gadget preview positioning it as a key tech upgrade for home cooks. This wireless thermometer connects to the Yummly app, giving you guided cooking and real-time temperature tracking without being tethered to the oven door. For December, when roasts, turkeys, and prime rib dominate menus, that kind of precision can be the difference between a centerpiece that impresses and one that dries out.
Beyond the holiday rush, the $39.99 price makes it a relatively accessible entry into smart kitchen gear compared with higher-end connected probes. It also reflects a broader trend in Costco’s “What’s New” aisles, where smart devices are curated to solve specific pain points rather than just add novelty. For members who already rely on recipe apps, integrating a thermometer that talks directly to your phone streamlines the cooking workflow and reduces guesswork for every weekend grilling session that follows.
4) Organic Valley Grassmilk Whole Milk
Organic Valley Grassmilk Whole Milk is entering the dairy aisle as a new exclusive in a half-gallon size priced at $3.49, a detail spelled out in Costco’s sustainability report. This product is built around 100 percent grass-fed sourcing, which appeals to members who scrutinize how their dairy is produced as closely as they check price tags. By positioning Grassmilk as an exclusive, Costco is signaling that it sees premium, sustainability-focused milk as a long-term category, not just a seasonal experiment.
The half-gallon format at $3.49 also hits a sweet spot for households that want organic, grass-fed milk but cannot always justify larger, more expensive jugs. It lets you test how your family likes the flavor and richness without committing to a full gallon. In the bigger picture, adding Grassmilk to the “What’s New” mix shows how Costco is using its scale to bring niche, eco-conscious dairy into mainstream carts, reinforcing the warehouse as a destination for both value and upgraded sourcing standards.
5) Kirkland Signature Diapers Size 3
Kirkland Signature Diapers Size 3 are rolling out in a 144 count pack at $34.99, and a family essentials feature underscores that these diapers now use new eco-friendly materials. That shift matters for parents who are balancing budget, performance, and environmental impact in a category they buy constantly. The large 144 count box is designed for bulk stock-ups, reducing emergency runs and aligning with how families already use Costco to simplify weekly logistics.
The eco-friendly update also reflects a broader move toward more responsible materials in everyday baby products, without forcing parents into niche, ultra-premium brands. For caregivers who already trust Kirkland Signature for wipes and formula, having a Size 3 diaper that explicitly touts greener construction makes it easier to keep most of the nursery list under one roof. It also signals that Costco is listening to members who want sustainability to show up in practical, high-volume items, not just in occasional specialty lines.
6) Sony WH-1000XM5 Noise-Canceling Headphones
The Sony WH-1000XM5 Noise-Canceling Headphones are hitting the electronics “What’s New” display at $349.99, with a detailed review tying their arrival to Costco’s December tech deals. This model is known for industry-leading active noise cancellation, long battery life, and a comfortable over-ear design that suits commuters and remote workers alike. Having it featured in the warehouse signals that Costco is not limiting its electronics aisle to budget options, but is also curating flagship gear at competitive pricing.
For members, the stakes are clear: buying a premium headset like the WH-1000XM5 at Costco can combine strong pricing with the retailer’s return policies, which many shoppers value for big-ticket electronics. The presence of such a high-profile model also elevates the entire “What’s New” tech section, encouraging you to scan for other serious hardware alongside stocking-stuffer gadgets. In a season when travel and noisy households collide, investing in top-tier noise canceling can be as much about sanity as sound quality.
7) Kirkland Signature Extra Virgin Olive Oil
Kirkland Signature Extra Virgin Olive Oil is arriving in a limited winter harvest edition, packaged in a 2L bottle at $14.99, as outlined in coverage of Costco imports. The winter harvest positioning suggests a focus on freshness and seasonal character, which is notable in a category where many shoppers are learning to pay closer attention to harvest timing and origin. At 2L, the bottle size is substantial enough for frequent cooks but still manageable for pantry storage.
The $14.99 price point for a winter harvest extra virgin oil underscores why Kirkland Signature has become a go-to for home cooks who want quality without specialty-store premiums. For members who sauté daily or bake bread and roasted vegetables all season, this edition offers a way to upgrade flavor across multiple dishes with a single purchase. It also fits the pattern of Kirkland Signature oils being singled out by enthusiasts as smart buys, reinforcing Costco’s role in democratizing access to better everyday ingredients.
8) Hello Bello Premium Diapers Size 4
Hello Bello Premium Diapers Size 4 are entering Costco in a 120 count pack at $29.99, co-branded with Kristen Bell and highlighted in a holiday shopping guide. The celebrity-backed branding is not just a marketing flourish, it signals a focus on design and feel that has already resonated with parents in other retail channels. Bringing a 120 count box into the warehouse format gives families who already like Hello Bello a way to scale up their purchases without losing the playful prints and soft materials they expect.
At $29.99, the per-diaper cost is structured to compete with other premium offerings while still fitting into a bulk-shopping mindset. For Costco members, the presence of both Hello Bello and Kirkland Signature diapers in adjacent aisles expands choice, letting you mix and match based on size, skin sensitivity, or budget. It also shows how the warehouse is leaning into partnerships with recognizable names like Kristen Bell to make the baby aisle feel curated rather than generic.
9) Kirkland Signature Frozen Wild Caught Sockeye Salmon
Kirkland Signature Frozen Wild Caught Sockeye Salmon is surfacing as a new sustainable seafood option in a 3 lb bag priced at $22.99, a detail spotlighted in a SeafoodSource industry update. The wild caught designation is central here, aligning with growing consumer interest in traceable, responsibly harvested fish. A 3 lb frozen format gives you flexibility to portion out fillets over multiple meals, which is especially useful when you are balancing weeknight dinners with holiday events.
The $22.99 price for wild sockeye positions it as a strong value compared with many supermarket offerings, particularly when you factor in the convenience of having a ready-to-cook protein in the freezer. For Costco, featuring this bag in the “What’s New” rotation underscores a commitment to sustainable seafood that goes beyond occasional promotions. It also gives health-focused members an easy way to keep omega-3 rich fish in regular rotation without constant fresh-market runs.
10) Vitamix Explorian Blender E310
The Vitamix Explorian Blender E310 is being introduced in the appliance aisle at $249.99, with a testing summary linking it to Costco’s extended Black Friday-style promotions. This model is known for its powerful motor and variable speed control, which can handle everything from smoothies and nut butters to hot soups. Having the E310 on the floor at $249.99 gives members access to a true high-performance blender at a price that undercuts many boutique kitchen stores.
For shoppers who have hesitated to invest in a Vitamix, seeing the Explorian E310 in person, alongside other appliances, can make the upgrade feel more attainable. It also reflects a broader trend in the “Latest Costco Finds and Deals for December” style coverage, where big-ticket kitchen tools are framed as long-term investments rather than impulse buys. In practical terms, adding a blender of this caliber to your counter can shift how you cook all year, from weekday meal prep to entertaining.
11) Kirkland Signature Probiotic 50 Billion CFU
Kirkland Signature Probiotic 50 Billion CFU is arriving with an updated formula in a 60 capsule bottle priced at $19.99, highlighted among winter wellness picks in Healthline’s recommendations. The 50 billion CFU figure is central, signaling a high-potency supplement aimed at members who are focused on digestive and immune support during colder months. At 60 capsules, the bottle covers roughly two months of daily use, which aligns neatly with a typical Costco shopping cycle.
The $19.99 price point for a high-count probiotic underscores why Kirkland Signature continues to anchor the supplement aisle for value-conscious members. It also dovetails with broader wellness trends that have Shoppers scanning labels more carefully, looking for clear CFU counts and updated formulations. As social feeds highlight “Must-See Shopping Highlights” and Costco finds in Moore Oklahoma, a refreshed probiotic formula shows how the warehouse is keeping pace with evolving health expectations, not just stocking basic vitamins.
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