I am preparing for my sleeve journey and found this great product- a toddler sippy top that works on standard water bottles. I had read vst post about using sippy cups after surgery- this way it reduces air and let's you keep track of how much water you have drank.

I bought two camelback eddy insulated bottles. One is for shakes, the other is for liquids. They hold 20oz, don't sweat and keep my drinks cold.

Truly I wouldn't waste the money. Sipping is not that big of deal. You get used to it really quick and it isn't that long before you are drinking (not gulping) normally. Feel free to invest in it, but I'd get just a regular water bottle.

I use a Kleen Kanteen with the sports cap. I have never had problems with air in my tummy and I'm only in my third week post-op.