I have this bag and actually use it as just a regular tote bag, but Lilly markets it as a beach bag. The inside wipes clean easily and there is an interior zip pocket for keeping iPhones and such dry and sand-free.
Lilly Pulitzer's insulated cooler bags are actually my top choice for a beach bag. I have the Limeade Floaters print from two years ago that I still use and it has held up well! You can fit a decent amount of stuff in it and it zips across the top. As an added bonus it comes with a pink Lilly Pulitzer bottle opener! (I have this cooler bag in Chin Chin as well, that I use as a multi-purpose bag.)
I don't have these next few bags so can't speak from personal experience of their usefulness as beach/pool totes, but they are all adorable and appear very functional as well:
My Stella & Dot Stylist Sarah highly recommends this tote as a beach bag. Multiple interior pockets, including a water bottle holder, make it easy to stay organized!
This nylon tote from Vineyard Vines also has multiple interior pockets and would be a great beach tote.
This monogrammed tote from Marley Lilly comes in multiple color options!
This woven tote has a beachy vibe!
What have been your "go-to" bags for trips to the beach and pool this summer?