Old or new?

Hi~ I recently bought a set of these to use, but figured I should make sure they’re not actually old prior to doing so. I really know nothing of Disney, including where to find info, apparently. Libbey “L” on the bottom. I just want to know if I can use them, or if they should just be displayed.

Is there a particular site for dating various logos? I also got a wall pocket because it’s an adorable deer.. turns out it says “Bambi Walt Disney Prod” faintly imprinted on the back, while this is just marked “Disney”.

Thank you!