A word of warning for these cups. My son loves drinking from them, but he gets through one every two weeks as the soft silicone 'nuby' spout splits very easily and you can't buy replacements. You have to buy the entire cup at approx £3.50 a time. This a waste of money & the actual cup which becomes redundant. I rang Tommee Tippee about this, but they said that they buy the cups / spouts from Nuby and they can't get supplies of the spouts alone. If I'd known I'd never started to use them, as it's infuriating as well as expensive. Howevever, my son is now hooked...