em 5 I was surprised at the size, it was bigger than I expected and can hold a lot of drink. The cover is adorable and the strap can extend to a long size so you can sling it over your shoulder and wear it at hip level even if you're an adult. It says in several places that it is for cold drink insulation only. However I used it for warm tea (not boiling, but well above room temperature) and there were no issues. The outside didn't change temperature at all even when I poured the hot water so it was safe to hold, and it stayed warm for a long time.Cleaning is extremely simple. There's only 2 parts, the bottle and the cap, which has removable silicone seals that are very easy to take off and reattach.