A cup is only 8 oz though. For reference that’s one of these
Don’t drink bottled water though.
Get yourself a 32oz reusable bottle and a good filter and that’s half of the recommendation when you finish it. I drink like 3 32oz bottles a day by just having my water bottle at my desk.
Yes! The biggest thing is having a cup you like and always keep it with you. Personally I recommend one with a straw as you're even more likely to reach and sip without thinking. But I promise if it's next to you, you will drink more without any effort
90% of filters are the same, a charcoal filter. But don't go cheap on the filter itself, as I personally don't believe you should cheap out on things relating to your health, and water quality is one of those.