At lowes you can buy a 20x30 piece of mirror for $10 and they will cut it however you want it.
I got my mirrors 6in X 6in.
This will make3-4 vases for $10!
I actually got the mirror cut to fit a frame and had a lot left over so the guy at lowes cut these for me to make this vase!
STEP 1- Heat up your glue gun
Step 3- Glue the sides together and then glue onto the base mirror
You can actually get the mirror cut even bigger to make a bigger vase.
These are a lot bigger than the Dollar Tree ones I've been seeing on pinterest and the price is the same!