Buying Diapers

I have always bought online and in stores. Most embarrassing part about being in the store was running almost into another lady's cart and suddenly realizing I was staring at a pack of adult diapers in her cart. For me it is most embarrassing when my teenager looks in my bag when I get home or intercepts my packages. It is getting easier to sneak them in, but what is the point since all six of my children probably already know?