"Feedback from my son was that his drink in his BottleRocket was cold all day. I checked this before I washed the lunchboxes at 6pm and the water was still cold, where my other son's generic water bottle, even with an ice insert, was room temperature." Thank you @soon2b_mrs_tippett for the awesome feedback shared with us on Instagram. http://planetbox.com/collections/accessories/products/bottle-rocket #PlanetBox #BottleRocket