Found out my watering can leaks, a month ago or so. Took advantage of this: tied up the can above our basil pot and now it has a drip feeder.
Note: This isn't a perfect solution. It wets the leaves which is almost never a good thing, but it's been hot outside so I have no concern about mould growth. Other than that it's great and it's nice to be able to quickly fill up the can and walk away letting it get on with it. And it's nice to use rope. And it looks unusual.
Rope is attached to bars with an Evenk Hitch, can is pulled up with a Trucker's Hitch (with a #1058 loop), finished off with wraps. I usually never use wraps because they're such a hassle to undo even though they look good, but I can get away with it this time because I'm using the Evenk: if I need to take this down I just pull on the end.