UBMOM straw cup includes Backflow Prevention Disk to prevent the liquid in the bottle being backflow by pressrue / temperature difference (hot/cold drink), while the Smart Cap is easy opening and at the same time can also help preventing water leakage for moving. Also, UBMOM straw cup can be used as a feeding bottle by replacing the straw nipple with the bottle nipple.
A very good straw cup for baby drinking formula. Easy to clean and assemble.
Very good straw cup for transitioning 1 year old
No leaking, my daughter love it.