12 items you should always buy from Costco

The Krazy Coupon Lady — experts on Costco deals — reports Costco’s pure maple syrup costs half of what you would pay at Amazon. House brand Kirkland’s maple syrup costs just 32 cents an ounce, compared to 67 cents at Trader Joe’s or 55.8 cents for Walmart’s non-organic option.

A number of experts, including My Frugal Adventures and Consumer Reports, say Costco is the best place to stock up on things such as extra virgin olive oil and coconut oil.

"In blind taste tests, we found the Kirkland Signature Real Mayonnaise to be just as good as Hellmann’s, for about 60 percent of the cost," writes Consumer Reports.

Kirkland detergents are proven to be just as effective as name-brand detergents that cost two or three times more, according to Consumer Reports tests. Kirkland’s Signature Free & Clear liquid detergent is just 11 cents per load, and nearly as successful in cleaning stains as Tide Plus Ultra Stain Release, which costs more than twice as much.

At Costco, Kirkland’s canola oil cooking spray is just 14.7 cents an ounce. That’s almost half of Walmart’s 27 cents, and way less than a four-pack of Pam, which sells for 4.63 cents on Amazon, reports the Krazy Coupon Lady.

Costco’s bulk batteries are a famously good deal — especially since this is a category where buying in bulk makes sense, as batteries are unlikely to expire.

You can buy three pounds of Costco spinach for the price of one pound at Walmart, reports the Krazy Coupon Lady. At Costco, it costs just 25 cents per ounce for Earthbound Farm’s organic baby spinach.

While Kirkland brands are reportedly pretty tasty, you can also save big by buying name brand booze at Costco. Plus, thanks to local liquor laws, in much of the US you can buy alcohol from Costco with no membership card.

The Kirkland vanilla ice cream won Consumer Reports testers over with its "big dairy flavor and complex vanilla-extract flavor." Plus, it’s just 30 cents per serving, compared to top-rated Ben & Jerry’s, which costs a dollar per serving.

At Costco, vanilla extract costs just 62 per ounce, reports the Krazy Coupon Lady. At Walmart, it’s $1.84. Plus, it’s not imitation vanilla — it’s the real dea.

According to Consumer Reports, Costco sells the most inexpensive pharmacy prescription drugs, with other pharmacies charging up to 447% more for the same drugs.

Even better, you don’t need to be a Costco member to use the pharmacy.

While you can buy plenty of items in bulk, some of Costco’s best deals are in the food court.

One of the best deals, a hot dog and drink, costs just $1.50. According to Business Insider taste testers, the hot dog is "very flavorful," with "a slight smokiness… similar to kielbasa."