Answer :
Answer:
A picture of taping the washer to the bottle, and arrows indicating that the tape shouldn't cover the washer hole.
Explanation:
hope this helps!
Answer:
You could say like a homemade sand timer or something like that.
Explanation:
I was tghinking this becasue you have to combine 2 bottles to make the sand flow from one to another. BUT I COULD BE WRONG.