Toddler won’t drink water

So my 2 year old always drank lots of water and had no problems up until now. I’ve never given her juice only milk and water. She now always drinks it and plays with it and just spits it everywhere, I’m worried that she is not getting enough water and getting dehydrated. Any tips on how to get her to drink water? Also if you give your toddler juice which juice do you give?