HydraMom 40oz Tumbler is the perfect way to get your hydration and express yourself (no pun intended) with the fun breastfeeding stickers included! Two way lid allows you to drink directly from lid or use the included BPA free straw. Lactation Consultant's recommend drinking to thirst to avoid dehydration and making milk can sure make you thirsty! The U.S. National Academies of Sciences, Engineering, and Medicine recommends 128 oz per day and also recommends every woman get at least 91oz of fluids per day. The HydraMom 40 oz tumbler makes it easy. Just fill it up three times per day and you are golden!