We have one of those pop-up canopy devices you sometimes see at dog shows. It's blue & is really easy to set up & dismantle. Here's a picture of the item:

Canopy

We pack it in the van & when it's called for set it up at dog shows to provide some shade. Since we've been off the dog show circuit for a few days, I decided to set it up down toward the end of the Presto Dog Phunny Pharm property. As a matter of fact, the picture up above shows the canopy in the spot where we had it set up last sumer.

Anyway, the canopy was up for a week or so when I noticed it was bowed in one area. Seems it had rained & because the blue fabric wasn't pulled taught enough, water had pooled on one of the sides. Although I removed the offending rainwater its pooling effect had sort of stretched the fabric so it was now belied in the middle.

So, I looked around the gargae & came up with the idea of using a couple of bungee cords. I attached one end to the top of the canopy & the other to the bowed area. Hopefully when it rains the water will simply flow off the now slightly raised area & not pool any longer.