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To those of us who live in Seattle, Kirkland is a charming waterfront suburb. I most associate it with a quirky tiki bar that’s now long gone and a friendly kitchen store that repaired my beloved stand mixer. But to devoted Costco shoppers, the word “Kirkland” means the store’s exclusive private brand, Kirkland Signature. Many stores have a house brand, but few, it seems, are as ubiquitous as…
