THe OL5950 8 " x 2.5 Does this label wrap around the whole water bottle like a wrap around or does it just stick on where ever you out? I need a label to wrap around the whole whole water bottle.

Depending on the size of the water bottle, the 8" dimensions may wrap all the way around. We have some of the popular water bottle brands pre-measured on our Search Labels by Container Type page. I have included a link below for your review. If you do not see your brand listed, you can use our printable ruler at the following link, https://www.onlinelabels.com/Support/Printable-Ruler.pdf . Just make sure that you print this at Actual Size or Scale 100% for accuracy. https://www.onlinelabels.com/containers/category/labels-for-water-bottles

Is the entire water bottle label adhesive or only the ends?

Our adhesive label materials have full coverage adhesive on the backside. The only materials with partial adhesive would be our cigar band labels, https://www.onlinelabels.com/cigar-labels.htm . You are welcome to request free samples of the product for testing with your water bottles by visiting the link below. https://www.onlinelabels.com/samples

Will this hold up in a cooler with ice/water on a water bottle

The Weatherproof Silver Polyester is a very durable and water resistant material so it can be used as a water bottle label. You are welcome to visit the link below to request a few sheets at no cost to test with your application. https://www.onlinelabels.com/samples

OL5950LP - These are plain white labels, right? No black border around each label as the image might imply?

Correct, these labels will not have a black border around the labels. The black lines that are shown in the thumbnail image are to showcase how the labels are cut on the sheet.

The OL5950 8"x2.5" water bottle labels- Can they be used as beer labels as well?

The OL5950 could be used on a beer bottle if you are looking for a full wrap around label. I have included a link below to our recommended products for beer bottles for you to review. https://www.onlinelabels.com/beer-bottle-labels.htm You are welcome to try samples of these products to test before placing an order. Please visit the link below to fill our Sample Request form. https://www.onlinelabels.com/samples