https://www.bbc.com/news/uk-england-derbyshire-57335740

A vet has drowned in her car.

Astonishingly in my car there appears no way to get out from inside if
it is locked and/or the electrics are off.

Apparently the answer is to have a device to break the side door glass.

I was looking at:

https://www.amazon.co.uk/Wupettier-Portable-Window-Breaker-Seatbelt/dp/B08MFBZ2GV/ref=psdc_2481712031_t1_B08XNRVC3G

or

https://www.amazon.co.uk/AmazonBasics-Emergency-Cutter-Window-Hammer/dp/B073J92G1J/ref=psdc_2481712031_t3_B00K63TG9C

Do they work?, my gut feeling is the hammer would be best.