are you talking about the (aluminum) foil wrapping on some bottles? that's usually champagne. wine i drink has cork or plastic stoppers and twist tops are either aluminum or steel

Only older and more expensive wines use the tin-lead cap. Even with that you do not need to remove the whole cap but to be safe, remove anything that would contact the wine. Lead is not so hazardous that momentary contact leads to such high levels that you get brain damage. People drink from pewter cups and leaded crystal all the time. The amount of lead you would get would be negligible compared the to liver damage you would get if you drank enough wine for it to matter. Most caps now are plastic or aluminum.