I maintain a birdbath on our patio all year. During the gardening season, I maintain four birdbaths.
This first birdbath is in the front yard right under our living room window. It is a homemade birdbath from two used disc blades and a pipe. (The base looks just like the top.) Someone welded them together. I got it free. One of the radio stations in town has a show where you can call in items to buy, sell, trade or giveaway. It's been there for decades. Way before ebay, free cycle, etc. I hardly ever miss a show. Anyway, one day someone had a free birdbath listed. It was "out front, just pick it up." I got lucky. It was still there and just barely fit into my back seat. I painted it black and it's been in service for at least five years. The top disc blade is rusting a bit though.
This birdbath was a Christmas present from my wonderful husband's late paternal grandmother. I remember her everytime I look at it. It came in two pieces with an epoxy. We stuck it together and sat it in the garden. It's shallow which is great for many birds but dries out easily on hot windy days. It's cute and has a prominent place in the back yard. And, seems to be holding up well. I think I've had it for almost ten years. It looks exactly the same as the day we sat it in the garden.
This is the year round patio birdbath. It's just a large container tray with a brick in it. During the winter, it sits on what we use for the water garden. All that black helps thaw the water except on the coldest winter days. I'll put it on some clay pots for the gardening season. It sits in the perfect spot for us to watch the birds from our kitchen table.
Here's another large container tray with a brick in it. I try to have a birdbath near the vegetable garden. Last year it sat on some stacked containers. It used to sit on the stump of a cherry tree that died. This year, it's on top of the two extra concrete blocks we had from building our new raised vegetable bed.