I picked up a 4 litre (1 gallon) water bottle a few years ago and it truly changed my life. I used to get headaches and feel cranky throughout the day because I'd always forget to drink enough water. Dehydration has so many negative effects on your energy.

This was the one I got and its been a game changer: https://www.amazon.ca/gp/product/B08YRH22X1/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1