It's much larger than I thought it would be.  That could have been solved by reading the description better, so my fault.  But because it's pretty big - holds 26 oz, it is just too large for me.  It was very easy to use and clean.  Easy to collapse once done.  And it's leak proof - I took in on an airplane and had it full in my purse, no problems.  If you are looking for a larger collapsible water bottle I can recommend this one.