What Defends You

An Insect or a Foreign Object in the Food: How Courts Have Decided These Claims

Written for: Restaurant owners and managers, insurers, counsel on either side; written to read the same for all of them

Parts of this page marked Professional synthesis, not law are a Board Certified Entomologist's reading of published records. They are not legal rules, they are not legal advice, and they are written to read the same for an owner, a customer, or either side's counsel.

A customer finds an insect in a salad. What happens next, legally, has been worked out in published decisions over ninety years, most of them from other states, and the answers are more measured than either side expects. This page sets out the tests courts use, in the courts’ own words, and what Utah’s record contains. It is not legal advice.

Serving food is a sale

In Utah, as in every state that adopted the Uniform Commercial Code, a restaurant meal carries an implied warranty that the food is merchantable, because the statute says serving food is a sale:

Unless excluded or modified (Section 70A-2-316), a warranty that the goods shall be merchantable is implied in a contract for their sale if the seller is a merchant with respect to goods of that kind. Under this section the serving for value of food or drink to be consumed either on the premises or elsewhere is a sale. — Utah Code 70A-2-314(1)

Merchantable goods must be, among other things, fit for the ordinary purposes for which such goods are used. That is the warranty a foreign-object claim is usually built on, alongside negligence.

The two tests

The older test asks whether the thing in the food was natural to it. California’s Supreme Court stated it in 1936 about a chicken bone in a chicken pie:

Bones which are natural to the type of meat served cannot legitimately be called a foreign substance, and a consumer who eats meat dishes ought to anticipate and be on his guard against the presence of such bones. — Mix v. Ingersoll Candy Co., 6 Cal. 2d 674 (Cal. 1936), as quoted in Mexicali Rose

The newer test asks what a reasonable consumer would expect. Illinois adopted it outright in 1992:

With an awareness of that test, consumers and their attorneys need ask themselves only one question before deciding to bring an action of this type: Would a reasonable consumer expect that a given product might contain the substance or matter causing a particular injury? — Jackson v. Nestle-Beich, Inc., 147 Ill. 2d 408 (Ill. 1992)

California, the same year, kept a piece of the old test and added the new one. For a substance natural to the dish, warranty and strict-liability claims are barred but negligence survives; for a foreign substance, every theory is available and the jury decides what was reasonably expected:

If the injury-producing substance is natural to the preparation of the food served, it can be said that it was reasonably expected by its very nature and the food cannot be determined unfit or defective. A plaintiff in such a case has no cause of action in strict liability or implied warranty. If, however, the presence of the natural substance is due to a restaurateur’s failure to exercise due care in food preparation, the injured patron may sue under a negligence theory. — Mexicali Rose v. Superior Court, 1 Cal. 4th 617 (Cal. 1992)

If the injury-causing substance is foreign to the food served, then the injured patron may also state a cause of action in implied warranty and strict liability, and the trier of fact will determine whether the substance (i) could be reasonably expected by the average consumer and (ii) rendered the food unfit or defective. — Mexicali Rose v. Superior Court, 1 Cal. 4th 617 (Cal. 1992)

An insect is foreign to any dish. Under either test, an insect-in-food claim is one a court will let a jury hear on the question of what was reasonably expected and whether the food was unfit. That is also why the famous fish-bone case went the other way; Massachusetts’ highest court found a fish bone in fish chowder to be exactly what a diner should expect:

We should be prepared to cope with the hazards of fish bones, the occasional presence of which in chowders is, it seems to us, to be anticipated, and which, in the light of a hallowed tradition, do not impair their fitness or merchantability. — Webster v. Blue Ship Tea Room, Inc., 347 Mass. 421 (Mass. 1964)

Utah’s record

No Utah appellate decision involving an insect or foreign object in food served at a restaurant was found in the searches run for this site (methodology). Utah’s two foreign-object decisions are both bottled-beverage cases, and the bottler won both.

In the 1950 case, a fly in a bottle of Coca-Cola from a workplace vending machine, the Utah Supreme Court reversed a verdict for the plaintiff. The evidence that mattered was the bottler’s process and the health officer’s inspections:

A Salt Lake City health officer testified that he had inspected defendant’s plant regularly, and that the plant was clean and well kept up, that the screens were up during September and that he had never seen insects in defendant’s plant. — Jordan v. Coca Cola Bottling Co., 117 Utah 578 (Utah 1950)

We conclude that there is not sufficient evidence on behalf of the plaintiff to sustain the burden of establishing a case for the jury. — Jordan v. Coca Cola Bottling Co., 117 Utah 578 (Utah 1950)

In the 1960 case, a paper clip in a bottle that had sat five weeks in an unlocked room, the court affirmed summary judgment for the bottler and the retailer. The plaintiff had pleaded three theories:

Plaintiff’s complaint sought recovery on one or more of three theories: 1) under the res ipsa loquitur principle, 2) on an implied warranty and 3) for violation of the statutes, on adulterated food. — Milligan v. Coca Cola Bottling Co., 11 Utah 2d 30 (Utah 1960)

Neither case chose between the foreign-natural and reasonable-expectation tests; this site does not say Utah has adopted either. What both cases turned on was proof: who had access to the bottle, and what the producer could show about its process. The lesson for a restaurant is in the evidence, not the test (records that hold up).

The Utah Product Liability Act

Utah has a product liability statute. Its definitions section defines “unreasonably dangerous” by what an ordinary consumer would contemplate:

“Unreasonably dangerous” means that the product was dangerous to an extent beyond which would be contemplated by the ordinary and prudent buyer, consumer, or user of that product in that community considering the product’s characteristics, propensities, risks, dangers, and uses together with any actual knowledge, training, or experience possessed by that particular buyer, user, or consumer. — Utah Code 78B-6-702(4), effective May 6, 2026

The section does not define “product,” and no Utah decision applying the Act to a restaurant meal was found. Whether it reaches restaurant food was not confirmed in the sources checked, and this site does not say that it does.

What this means for a restaurant

Professional synthesis, not law. Three things follow from the decisions above.

1. An insect in a dish is a claim a court will hear. It is foreign to the food, so the question goes to what a reasonable diner expected and whether the food was unfit. That is a jury question in the states that have decided it.
2. Process and records are what won the Utah cases. In both Utah decisions the defendant could show how the product was handled and who had inspected the plant. A restaurant’s equivalent is its pest program and the records of it.
3. The first hour matters more than the lawsuit. How a sighting is handled at the table, what is said, what is written down and photographed, and whether the customer leaves feeling heard, decide most of these situations long before any statute does. That is the response card and the reputation pages.