Yoga teacher getting my first one

So I’m a yoga teacher and all my students have an Owala and speak really highly of it. I noticed they come in lots of colors and types. What would be best for me as someone who just tosses my water bottle in my yoga bag?

I plan to get whatever they have on Amazon because I don’t have any stores close to me that sell them at the moment.

I also get really grossed out by most water bottles because they get dirty and moldy so easily. So usually I use it once or twice and then put it in the dish washer.

How is cleaning with these? I feel like having a straw in there may make it harder. How often do you clean?