She drank 2 cups of water every hour for 8 hours so 2*8=<<2*8=16>>16 cups
She poured 5 bottles of waters on her plants and each holds 2 cups so 5*2 = <<5*2=10>>10 cups of water
She drank 16 cups of water and used 10 cups of water so she had 16+10 = <<16+10=26>>26 cups of water
#### 26