I'm what my husband would call a "water bottle junkie". Everywhere I go, I have my trusty bottle. I've tried them all. Plastic, metal, big and small and this is my FAVORITE! It fits ALL cupholders, is easy to clean, lid comes completely off for filling and holds 26oz! I could go on and on. BlenderBottle Radian Insulated Stainless Steel Shaker Bottle, Natural/Black, 26-Ounce https://www.amazon.com/dp/B0751GW817/ref=cm_sw_r_other_apa_i_WSRwEbCJ4BFK6