While these have been out for about a year, folding or collapsible bottles are becoming more and more popular. My favorite one (this week) is the Hydra bottle below. Mainly because it looks like a bottle (boy does that sound stupid).
There are a number of different sizes, shapes and price points available, but I would also beware. I did have one of these precious bottles leak when I went bowling. The worst part is that it was carrying red wine in it. Most people refer to these as VAPUR bottles.
If you are looking for creative ideas, be sure to contact one of our sales associates. You would be surprised at some of the ideas we come up with.