This mug is anything but not Leakproof
There should be at least 12 months,
Our 14 months son comes Super cope with the hold separate and drink from this cup. Under the supervision left-alone I would not him with the cup.
But as soon as the cup is tilted (without drinking, without pressing), spills out of the whole content and not the little.
The cover does not hold the fluid back, everything accumulates underneath, and now if you want to let the child drink from it, you open the cover and everything runs out.
Beautiful mess. Fortunately tested over the sink.
And the Avent sold for this as Leak-proof cup for 9.99, this is not worth the money.
We therefore continue to use the feeding cups of Avent.