“I have been using Healthy Human water bottles for a couple of years now. I take one to work every day and my water stays cold from morning through the afternoon. I do purchase the Flip N Sip top because it is easy to use, does not leak, and has a latch to ensure the lid doesn't flip unless you want it to. I do not put the water bottle in the dishwasher, but I do put the flip tops in. Love my Healthy Human bottles so much that I give them to friends and family as gifts.”