You can get a free kitchen scale and sign up during business hours at the North Shore Recycling Program. They are located at 148 2nd St East, North Vancouver, BC.
Tip: Keep bananas longer by wrapping the crown of the stems with plastic wrap. If bananas start getting over-ripe, you can refrigerate them. The skins will turn dark but the fruit inside will keep. After they are too ripe to eat raw, peel and toss them in the freezer (in a freezer bag) to store for use in baking or smoothies.