The 10 pound pull latch I installed has worked fine for more than a year and during 4 trips. I thought about adding a second, as a just in case measure, one shelf down but it hasn't been necessary.
For my top kitchen drawer, which tends to come open now and again, I bought a couple of these child proofing locks when the grandson was born to start making the house a little safer.
https://www.amazon.com/gp/product/B0...rd_i=166865011
I have not installed one of the latches (above) here because the cabinet extension/cutting board is in the top part of that drawer and I'll have to do a little wood trimming to get the clearance required to install the latch on the bottom or side of the drawer.