CHICAGO — Accidental poisonings from squishy laundry detergent packets sometimes mistaken for toys or candy landed more than 700 U.S. children in the hospital in just two years, researchers report. Coma and seizures were among the most serious complications.

The cases stem from the more than 17,000 poison center calls about the products received in the past two years. The calls involved children younger than 6 and most weren’t seriously harmed. But one child died last year and the potential risks highlight a need for even safer packaging, the researchers said.

The products contain concentrated liquid laundry soap and became widely available in the U.S. two years ago. Some are multicolored and may look enticing to young children. Poisoning or injuries including mouth, throat and eye burns can occur when kids burst the capsules or put them in their mouths.

In the study, 144 had eye injuries, 30 went into comas and 12 had seizures.

Exposure to household cleaning products is among the top reasons for calls to poison centers involving young children.