Product review (1 stars): Comes disassembled with no instructions for assembly
I have used this product in the past.  It lasted for many years.  I purchased this and it came disassembled.  The rubber part that allows air but prevents spills was not installed.  If it was just that I could have installed it.  But, there was a plastic insert that I could not figure out how it was used/installed.  I called the manufacturer to find out how it is supposed to be put together but they didn't have any idea or any schematics that I could use.  I contacted Amazon and as usual they were great at refunding/exchanging.  I got another one and it was in the same condition.  I had to return that as well.  Amazon had the best price and love their return policy.  I am hesitant to order from some where else because it may come the same way and it might be harder to get a refund.