Anything that has the child protection caps on them. I know why they are made that way, but I hate them. Especially when you get older and have arthritis in your fingers or hands. With my high blood pressure medication, you have to press down and twist the plastic cover. So I take a needlenose pliers and rip out the that little plastic disc on the inside cover.
But the one that infuriates me the most is the heavey plastic gas can containers that you get at Walmart or other places. The "child protection" spouts, make it harder than hell to remove them or use them. First, when I get home, I break off all of the child protection parts, or if that doesn't work, I'll go on Amazon and order the old style spouts, which I recently did.
When I buy laundry detergeant in pods, I cut off that zip close top nonsense. I have no small children in the house, so I don't need all of that crap.