jean, and other people -
before you actually hang weights at the top of canopy legs please
read the random online advice below, some from canopy makers, and use
a little logic, i.e.: a tree with a tree house (weight at top) will
blow over long before a tree with a structure at the bottom.
- 
“Never hang weights from the top of the canopy, such as water [see 
 bottom] - or sand-filled milk jugs. They will fall and injure
 somebody. Always anchor weights to the bottom of the legs of the
 canopy.”
- 
“The higher the weight the higher the center of gravity and the 
 likelihood of the canopy blowing over increases.”
- 
“Weigh down the legs of the canopy. Purchase ring weights that are 
 specially designed to snap onto the bottom of each canopy leg.”
this site seemed to be the best of the random sites i found:
where it advises you that…
... the best way to attach them [weights] to your tent, I do not recommend suspending them directly from your tent [top]! The little button that telescopes the leg on most canopies was not meant to hold 30 extra pounds! Rest them on the ground and use something with a little give like rope, or something adjustable, like strapping for a car. I have also seen heavy duty bungees.
so people, either use logic or at some show you might hear “take
down those weights and slowly step away from the tent. you have the
right to be illogical but you do not have the right to endanger your
neighbors.”
ive
- a reminder that water weighs only about 8 pounds a gallon and, logic
 tells me, you can’t get more than a gallon of water into a gallon jug.