I was looking for a replacement tumbler since my husband took over the one I had and it was a great one too. It kept hot liquid hot for 8 hours and cold liquids cold for longer, but if it fell the contents would spill, the only downfall. So when I received the text from Cecilia’s House about the 40 oz, hydrolock, leak proof straw, tumbler I had to look into it. By the time I was done I purchased two, for myself and as a gift. Thankful for receiving that text message.