Nifty free flow weighted straw follows the liquid to aid any way up drinking The ideal baby sippy cup to move on from a bottle or breastfeeding Leakproof flip top lid stores the straw hygienically away Handy measure on the side to see how much they've drunk Ideal for both traditional and baby led weaning Tested to European standards, BPA & phthalate free, for age 6m+ Suitable for cold or room temperature drinks only - if milk comes up the straw, this will be due to a build up of vapour pressure, either from warm drinks or from changing temperature, e.g. fridge cold milk in a warm room. Release the pressure by twisting the lid to allow it to escape before flipping the lid.