I use and like the shooting gallery (link already provided above) and it has been simple enough to make my own version of one. The hardest part was dulling the edges of the opening so my chams won’t injure their feet if they grab it (and they do grab it). There are several similar style feeders all over Etsy and I think Fram’s Chams sells one too. In a pinch, you could just poke a few small holes in the bottom of a tall deli cup (for any water to drain) and zip tie that to a branch or vine. Or, cut a hole in the middle of the side, hot glue a piece of plastic canvas on the inside wall, pop the lid on, poke same drain holes in the bottom and hang on a branch.