"I hesitated before buying these because of mentions of poor quality. I'm glad that I did because they were a huge hit at a 3-year old birthday party. While they are not as durable or of the quality as the name brand sippy cups, they more than held their own for a party drink and went home with each child. I imagine they will last for a few weeks of use -- at least until the novelty wears off. Well worth the money. Every single parent commented on how cute they were and asked where I bought them."