What are 5 potential uses for an empty La Croix can?
1. Make your bike sound like it has an engine by wrapping the can around the back tire.
2. A percussion instrument to play along with friends in a jam session.  You could just crinkle it, hit it with a pen, or fill it with sand or debris and shake it.  
3. A baking tool.  You can used the bottom of the can to stamp out perfectly circle, uniform cookies from a rolled-out sheet of cookie dough.
4. A field razor.  Tear the can carefully to create an effective cutting device for emergency use.
5. A make shift ball to throw around with friends at the park. An empty can could be a fun projectile to use in a friendly game of 3 Flies Up.
The answer is to drink it.
The answer is to drink it.
The answer is to

I'm not sure what you mean by "empty" but I'm sure you can
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1. Use as a watering can
2. Use as a