These were fantastic for fruits etc. when first starting solids. Way easier to clean than mesh and the varying sizes was great too depending on the food.
When I was breast feeding I did the pitcher method on days I was away from babe to make sure nutrients etc. was as even across the board as possible for the frozen milk.
Dr. Brown's Baby Formula Mixing Pitcher, 32oz
These are great for pumping on the go if you aren't using a wearable pump like a Willow. Just use the right attachment and pump right into the bag and then you just put the right top on it for drinking and you're good to go.
This has helped create an outdoor space for my daughter. It does not stick in the ground that well but I think if you changed the stakes used for that to maybe wood ones it would be fine. I just haven't done that.
