What was this used for?

I was told that this is just an lemonade pitcher. The insert was used for the ice. It made it so the drink didnt get watered down. I am no expert at all. Just thought I would let you know what I was told. We had one from my grandmothers house. Have a great day!

I could be wrong but I believe it is an anisette decantur. I have recently viewed a program on tv that described and showed a similar item that was used, as several have mentioned to you, for ice in the middle insert to cool the anisette. This was the proper and most popular manner in which they consumed it in the early 19th and 20th century I believe.

My guess is that it's a Victorian pressed glass decanter although the insert appears to be blown glass. Look on the lid  (especially the underside of the handle near the base)  with a magnifier for any markings because they are most likely there and quite small.