Stanley The Iceflow Flip Straw Thermos Cup with Straw 0.59 Lt Flask Sari

Hi, whether it leaks with the straw part on depends on how you hold the product. If you turn the thermos upside down or tilt it while the pipette is open, there may be a possibility of dripping due to air/water discharge. This is the nature of the straw mechanism of this product, not a malfunction. For safe use, it is recommended that the pipette part be in a closed (turned) position; this way, you can easily carry it in your bag.