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10 Costco Items That Are Literally Half What You'd Pay on Amazon

These Costco deals prove you can slash your household spending without sacrificing quality.

By Sarah Barkley

Edited by Laura Ratliff

Updated July 18, 2025

With prices on everyday essentials rising, shopping strategically has become one of the most effective ways to save money. Warehouse clubs like Costco are more appealing than ever for shoppers wanting to stretch their budget without giving up their favorite brands, and you can find many items that cost significantly less than if you bought them on Amazon.

Here are 10 items that allow you to save money at Costco, costing half as much as they do on Amazon.

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Downy Unstopables

Price: $21.49

This 37.5-ounce Costco container of Downy Unstopables In-Wash Scent Booster Beads costs around 63 cents per ounce. Buying a 37.6-ounce container at Amazon costs $33.99, which works out to 90 cents per ounce. You'll save significantly by purchasing this laundry booster at Costco rather than online at Amazon.

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Starbucks K-Cups

Price: $37.99 (on sale from $45.99)

Shopping at Costco over Amazon for your coffee can help you save significantly. When you buy a 72-count of medium roast Starbucks Pike Place K-Cups at Costco, each cup costs 53 cents.

At Amazon, the Starbucks Pike Place K-Cups are on sale for $39.89, down from $43.50, for two packs of 24, making each one 83 cents.

Kirkland Signature Flex-Tech Kitchen Trash Bags

Price: $20.99

Trash bags are a necessary purchase, but not much fun or long-lasting. Therefore, the more money you can save on them, the better. Costco sells a 200-count box of 30-gallon Kirkland Signature Flex-Tech Kitchen Trash Bags for only 11 cents per bag.

The same-sized Amazon Basics Flextra Multipurpose Drawstring Trash Bags come in a 50-pack, which is on sale for $10.15 from $13.70, making each bag $0.20.

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Kirkland Signature Mixed Nuts

Price: $16.59

Nuts can be expensive, but they're a delicious and filling snack, so it's a pantry staple you'll want to stock up on for a good deal. Kirkland Signature Extra Fancy Mixed Salted Nuts come in a 2.5-pound container and cost around $6.64 per pound. The same product is $30.99 on Amazon, which translates to approximately $12.40 per pound.

Quaker Old Fashioned Oats

Price: $11.99

You can buy 10 pounds of Quaker Old Fashioned Oats at Costco for only 6 cents per ounce. On Amazon, you can purchase the same brand in 2.5-pound packs of two (for a total of five pounds) for $11.08, on sale from $13.86, making it 14 cents per ounce. It's more than double the price on Amazon, making Costco the clear choice for buying oats.

Premier Protein Shakes

Price: $31.99

Premier protein shakes are ideal for post-workout recovery, having 30 grams of protein, and you don't have to spend a fortune on them. You can purchase an 18-pack of the chocolate flavor at Costco, which results in each drink costing only $1.78. If you order them on Amazon, you can get an 18-pack for $40.49, which works out to $2.25 each.

Costco Secrets: 7 genius hacks Costco shoppers should know

Lysol Disinfecting Wipes

Price: $13.99 (on sale from $16.99)

For only 4 cents per sheet, you can obtain 380 Lysol wipes, distributed across four 95-count containers. Two of the containers are Crisp Linen scent, and two are Lemon and Lime Blossom. On Amazon, you can purchase four packs of 80-count wipes for $14.97, or 5 cents per wipe, which is slightly more than Costco.

Kirkland Signature Organic Unbleached All-Purpose Flour

Price: $19.99

Organic, unbleached flour can be expensive, but you can purchase two 10-pound bags at Costco for just $1 per pound.

A comparable item on Amazon, King Arthur Organic and Unbleached All-Purpose Flour, only sold in a two-pound bag for $10.01, making it $5 per pound.

Kirkland Signature AAA Batteries

Price: $15.99

When you purchase this 48-pack of Kirkland Signature AAA Batteries at Costco, you pay only 33 cents per battery. Amazon Basics AAA batteries cost $8.99 for a 12-pack, which works out to 75 cents per battery. With Costco being so much less than you'd pay on Amazon, you'll want to stock up with the big pack.

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Shopping pro tip: This month's best deals

July is in full swing, bringing the height of summer. That also means peak season for hot deals and unbeatable savings. Now’s the time to save big on:

Grills, coolers, and outdoor living upgrades
Travel must-haves for road trips and beach days
Swimwear and summer fashion
For grocery savings, grab seasonal produce like watermelon, peaches, and tomatoes

While you're enjoying the sunshine, retailers are quietly making room for back-to-school inventory. That makes July a prime opportunity to scoop up summer favorites while the deals are still blazing.

Quick tips: How to save on your grocery bill

Grocery shopping doesn't have to break the bank when you use the right strategies. Here are three quick tips for reducing food expenses:

Buy store brands instead of name brands whenever possible.
Always make sure to compare unit prices, not just sticker prices.
Join your store's loyalty program so you don’t miss out on member discounts.

Even though something like choosing coupons in your grocery store app can feel like an annoying task, the savings can really add up.

Kirkland Signature Organic Maple Syrup

Price: $14.99

Kirkland Signature Organic Pure Maple Syrup is available in a 33.8-ounce container and is certified kosher and gluten-free. At only 44 cents per ounce at Costco, it's significantly less expensive than a comparable product on Amazon.

Amazon sells 365 by Whole Foods Market organic maple syrup in a 32-ounce container for $22.49, which works out to 70 cents per ounce.

Costco Insider's Guide: 12 little clever ways to get more out of your Costco membership

Bottom line

Shopping at Costco isn't just about buying in bulk. It's also about paying less for the same products you'd find online. Now, you can save money shopping by planning your next stock-up trip with these price comparisons in mind.

Costco also offers unique member perks like discounted gas, travel savings, and free health screenings, adding even more value to your membership.

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