With the pandemic, I am very hesitant to go in to convenience stores for fluids on long weekend rides. So, I needed bottles with more capacity and these did the job. Two of these plus a juice in a jersey pocket put me well over a liter of fluids. The material is very soft/squishy so you may want to take that into consideration if you have certain bottle cages that don't fit tightly around bottle. These are absolutely perfect. Get them if you're going long and worry about the safety of stops.