How would I make a waterbed?

Question

I want to make one that I could put in the trunk of my car. But, I also want to be able to remove it whenever necessary. So, how would you make a waterbed, or what websites or images can you send me that shows how a waterbed is made?

Answer 1

Don't even think about it!

Half a ton of water is not likely to improve the performance of your car much.