“What kind of water do you put into a waterbed?”/“Spring water.”

A riddle about spring water is:
 
Q: What kind of water do you put into a waterbed?
A: Spring water.
   
“So, spring water at the grocery store. That’s for your water bed right?” was posted on Twitter on January 29, 2012. “What kind of water do you put into a waterbed? Spring water” was posted on Reddit—Jokes on September 20, 2015.
 
   
Twitter
Jason Kuntz‏
@create2destroy
So, spring water at the grocery store. That’s for your water bed right?
7:08 PM - 29 Jan 2012
 
Twitter
Christian Hardy‏
@C_Hardy23
If you have a water bed with spring water in it and it has springs under it… Would it be a spring spring water bed?
12:56 PM - 18 Apr 2012
 
Twitter
Rick Sorkin‏
@ricksorkin
“what do you get when you cross a spring mattress with a water-filled mattress? A Spring Water bed” #terrible #textfrommydad
6:09 PM - 1 Aug 2013
 
Reddit—Jokes
What kind of water do you put into a waterbed?
submitted September 20, 2015 by blow_a_stink_muffin
Spring water
   
Twitter
Terrible Jokes‏
@doyouevenjoke
What kind of water do you put into a waterbed?
Spring water
1:32 PM - 20 Sep 2015
 
Twitter
shaun‏
@DrunkyQB
what kind of water do you put in a water bed???
spring water
4:36 AM - 21 Sep 2015
 
Twitter
James Martin‏
@Pundamentalism
You can make a water-bed more bouncy by using spring water.
4:37 PM - 15 Mar 2017