I had instacart delivery today. owner looks after a stray cat. 2 bottles of colgate total mouthwash delivered. i didnt see any holes. i rinsed bottles with plain water before using. rabies? can cats bite into tough plastic like this?? i used once?

You fear of rabies is out of control, there is no risk for rabies in above context, a perforated bottle will leak. For reliable information regarding rabies transmission check cdc.gov.

Can cats bite through plastic bottle? Don't know. Ask a Veterinarian. No holes, then no puncture. Plastic bottles don't self heal. If neighbor caring for stray cat it's your neighbor's responsibility to see to it that cat is neutered and has appropriate vaccinations to prevent spread of diseases.