For seniors, the natural process of aging can make it more difficult to firmly grasp lids and open containers. One simple way to make opening containers easier is to cut open (safely) a tennis ball and use the non slip skin to open lids.
Source: “Caregiver Tips: Make a Tennis Ball Jar Opener.” AARP, www.aarp.org/caregiving/tips-hacks/personal-care/self-zipper-helper.