Eighteen genuinely new arrivals just landed at Costco warehouses in May 2026 — and the cross-warehouse buzz on a handful of them is louder than anything we’ve seen since the bakery comeback wave. From the brand-new $17 Kirkland Sparkling Energy Drink (already being called the “Celsius killer”) to a $9 blueberry sourdough loaf that has members driving to three stores to find a copy, the new-arrival mix this month covers everything from indulgent bakery to viral frozen treats to value-priced pantry staples. Here’s the full list, with prices, sources, and what we’re hearing from members in May 2026.
1. Kirkland Sparkling Energy Drink – $16.99 / 24-pack
- Brand-new Kirkland Signature energy line in Tropical, Peach, and Orange — 200mg caffeine per can, zero sugar, and roughly 70¢ per can vs. Celsius at $2+. Cross-store reports show fast sell-throughs and Costco employees pulling pallets from the back daily.
- The “Celsius killer” framing from Parade and Yahoo Lifestyle reviews has driven outsized awareness; members who fly through Celsius say the Kirkland line tastes nearly identical with cleaner ingredient panels.
- Stocking is regional and uneven so far — Pacific and Mountain warehouses got first shipments, with East Coast rollout still scaling through May. Worth a quick warehouse scan or a Costco.com inventory check before driving over.
2. Kirkland Blueberry Sourdough Bread – $8.99 / 2 lb hearth-baked loaf
- A 2-pound hearth-baked sourdough loaded with real dried blueberries — an answer to long-running “not enough fruit” complaints about other Costco fruit breads. Members are buying two at a time and freezing one.
- BuzzFeed, Tasting Table, The Takeout, and Sporked have all reviewed the loaf within a week of launch, all four positively; the French-toast use case in particular is going viral.
- Bakery stocks it for a 2–3 day window before it sells through. If your warehouse hasn’t carried it yet, ask the bakery counter when the next bake is scheduled.
3. Kirkland Ultra-Filtered 2% Lactose-Free Milk – $12.99 / 3 × 52 oz pack
- New Kirkland-branded ultra-filtered lactose-free milk in a 3-pack with the same high-protein, low-sugar profile as Fairlife — for materially less per ounce.
- Daily Meal and The Takeout both flagged this as a clear Fairlife dupe; member testing on Reddit (filtered through secondary coverage) is calling the taste “indistinguishable” from the name brand.
- Critical for shoppers managing lactose intolerance — check the cold cases near the Fairlife shelf, where Costco has been stocking it side-by-side.
4. Kirkland Tonkotsu Pork Ramen Broth – $16.69 / 4-pack
- A slow-simmered pork bone broth designed to upgrade instant ramen into something close to restaurant-quality — roughly $4.20 per serving for the kind of bowl that runs $18+ at a ramen-ya.
- Mashed and Daily Meal both highlighted this as the most write-home item in May launches; Reddit cooks are mixing it with fresh noodles and a soft-boiled egg.
- Shelf-stable so it stocks deep on shelves — pair with the Kirkland egg noodles in the dried pasta aisle and a few green onions for under $8 a bowl.
5. Häagen-Dazs Mini Dubai-Style Chocolate Ice Cream Bars – $15.49 / 20-count box
- The viral Dubai chocolate trend (pistachio cream + crispy kataifi + milk chocolate) finally in ice-cream-bar form — Häagen-Dazs minis at a Costco-exclusive 20-count.
- Chowhound, Brit+Co, and Tasting Table all flagged this as the May standout in the freezer aisle; the mini format is the perfect serving-size answer for households where one whole bar is too much.
- Freezer space in the warehouse is shrinking the longer this stays popular — if you see them, grab them now and check the “best by” date for a 6+ month freezer window.
6. Kisko Giant Freezies – $13.70 / 50-count variety pack
- A 50-count variety pack of giant freeze-and-eat ice pops (Grape / Orange / Cherry / Blue Raspberry / Cream Soda) — classic boomer-era summer snack at warehouse pricing.
- Brit+Co called these the under-$15 summer find of May; Money Talks News and RetailShout both flagged the grandkid-ready value angle.
- At 27 cents per giant pop, this is the kind of item that pays for the warehouse trip by itself if you’ve got summer guests or grandkids coming through.
7. Edward Marc Strawberry Shortcake Bites – $11.89 / box
- Shortbread cookies sandwiched with strawberry creme — designed to taste like the classic Good Humor strawberry shortcake ice cream truck bar, but shelf-stable.
- Daily Meal and Sporked both reviewed these positively in mid-May; the nostalgia pull on the 60+ Costco audience is meaningful.
- Note this is NOT the same as the recently-vetoed strawberry-pie or peaches-and-cream bakery items — this is a Brookside-style snackable bite, packed for desk drawers and lunchboxes.
8. Kirkland Sea Salt Popcorn (Coconut Oil) – $9.99 / 36-bag club pack
- Three-ingredient clean-label popcorn (popcorn, coconut oil, sea salt) at roughly 28 cents per bag — about half the unit price of SkinnyPop and with a cleaner ingredient panel.
- RetailShout and Chowhound both flagged this as the hidden-bargain pick of the month; the 36-count carton holds for months in the pantry.
- Stock at the front of the dry-snack aisle, end-cap-merchandised in most warehouses through May.
9. Kirkland BBQ Chicken Mac & Cheese with Bacon – $4.49/lb (deli case)
- Corkscrew pasta tossed with rotisserie chicken, smoky BBQ sauce, and bacon crumbles — heat-and-serve from the deli case at a per-pound price that beats anything comparable at the grocery store.
- Mashed and Foodie both reviewed this as the deli-case launch of the month; family-friendly portion at roughly $13–$15 for a tray that feeds four.
- Find it in the refrigerated prepared-foods case near the rotisserie chicken station, often discounted on the “same-day pull” cart in the evenings.
10. Crust & Crumb Tear N’ Share Cinnamon Bun – $12.99 / 26.1 oz
- A ready-to-bake brioche pull-apart cinnamon bun made with Irish butter, with the frosting packet included — goes from package to table in about 15 minutes of oven time.
- Sporked’s May 11 review and Costco-watcher app Warehouse Runner both flagged this as the best brunch find in months.
- Pull-apart format makes it perfect for Sunday brunch or a weekend morning with company — no slicing required.
11. Jeni’s Key Lime Pie Frozen Dessert Sandwiches – $14.49 / 8-count
- Jeni’s Splendid Ice Creams brought their key lime pie flavor to Costco in a sandwich format — graham-style cookies hugging the tangy Florida-key-lime ice cream.
- Parade, Brit+Co, and The Takeout all called these the standout artisanal frozen find of May; Jeni’s is a premium brand and Costco pricing brings the per-sandwich cost to roughly $1.80.
- Shelf life on these is short once stores get them out the door — if you spot them, grab two boxes.
12. Dole Whip Tropical Guava Passion – $6.97 / 8-pack (Item #2008110)
- The Disney-park-favorite Dole Whip in a new Tropical Guava Passion variety, an 8-pack of frozen swirl cups — on sale at $6.97 against the regular $10.49.
- Parade and Warehouse Runner both confirmed the sale window through May 2026; the Tropical Guava Passion variety is a new flavor introduction.
- Find them in the freezer aisle near the Outshine bars; the new flavor is replacing some of the older mango and pineapple stock.
13. Mavens Vietnamese Coffee Ice Cream – $18.15 / pint
- A small-batch artisanal pint from Mavens with strong Vietnamese-coffee notes (sweetened condensed milk + dark roast) — not a flavor Costco has carried before from this brand.
- Daily Meal and Tasting Table both reviewed this as the must-try premium pint of the month; closer to dessert than to coffee-flavored ice cream.
- Stock is limited to a handful of warehouses in Pacific and Northeast regions through May; ask the freezer attendant whether your store has it.
14. Fotis Fine Foods Chimichurri Sauce – $9.99 / 24 oz (Item #1952037)
- The first major Argentinian-style chimichurri to hit Costco shelves — parsley, garlic, oregano, red wine vinegar, and olive oil at a 24-ounce jar size that runs $4–$6 less than comparable specialty-store versions.
- Daily Meal and Cruising Costco both flagged the May 4 launch; works as a steak finishing sauce, a marinade, or a dressing for roasted vegetables.
- Refrigerated section near the salad dressings; once opened, holds for 3–4 weeks in the fridge.
15. Monteur Strawberry Cream Waffle Cakes – $13.99 / 16-pack (frozen)
- Imported Japanese thaw-and-serve dessert — fluffy waffle shells filled with strawberry cream filling, riding the broader Japanese-dessert wave that’s driven so much foot traffic this year.
- Parade and Chowhound both reviewed this as the best new frozen-aisle launch from the international suppliers; serves 2 small bites per package.
- Thaw 30 minutes from frozen before serving; pairs well with strong coffee or after-dinner tea.
16. Martinelli’s Sparkling Juice Variety Pack – $19.99 / 18 × 8.4 oz cans (Item #2042158)
- Martinelli’s first skinny-can sparkling juice variety pack at Costco — Apple Mango, Apple, and Apple Cranberry, 100% juice with no added sugar.
- Food Republic and Costco.com both confirmed the April–May rollout; a meaningful upgrade over generic sparkling waters for shoppers cutting back on artificial sweeteners.
- Beverages aisle, near the LaCroix and bubbly waters; 8.4 oz can format makes them easy to chill and grab.
17. Kirkland Signature Sweet & Salty Cookies – $10.99 / 24-count
- A brown-butter cookie dough loaded with chocolate chips, pretzel bits, and salted caramel pieces — new from the Kirkland bakery in May, rolling out warehouse-by-warehouse through the month.
- Tasting Table and Parade both reviewed these positively; the sweet-salty profile and 24-count bakery box format makes them a strong fit for entertaining.
- Note that bakery rollouts are uneven; some warehouses got them May 1, others as late as May 18. Check the bakery case.
18. Chomps Jalapeño Grass-Fed Beef Sticks – $16.99 / 12-pack (Item #1722831)
- 100% grass-fed beef sticks with a spicy jalapeño profile, 10g protein per stick, Costco-exclusive 12-pack format from Chomps that launched in April 2026.
- Tasting Table review and Costco.com PDP both confirm; a strong fit for shoppers building protein-forward snack packs or road-trip bags.
- Stocked at the front-of-store snack endcap in most warehouses; shelf-stable through October.
Final thoughts
- Eighteen genuine May 2026 arrivals is a heavy refresh by Costco standards; expect roughly half of these to settle into permanent rotation and the rest to rotate out by late summer.
- The strongest single-store buys: Blueberry Sourdough (#2), Kirkland Energy Drink (#1), and Jeni’s Key Lime Pie Sandwiches (#11) if you can find them.
- The strongest stocking-up plays: Sea Salt Popcorn (#8), Kisko Freezies (#6), and Chomps Beef Sticks (#18) — long shelf life, household-friendly formats.
- As always: check Costco.com for current online pricing on item-numbered listings, and ask warehouse staff if you don’t see the SKU on the floor — some items get pulled to the back during slow stretches.
