New Bird Bath!

Got a new bird bath insert from Amazon to make it easier to clean and also to get rid of ice etc. The concrete one is difficult, but it is very, very, old.
Ok, I know, I should have measured the concrete bird bath before I ordered it but it looked ok. Problem is that it's designed to be part of a combined feeding and watering station for birds.
I did a return request, reason being it is not suitable for the purpose I purchased it for. I had a nice message back from Amazon saying they will refund the cost but not to bother sending it back. 
I'll use it as it's due to be frosty again tomorrow, but I'll keep an eye open for one that might actually fit the concrete bird bath.