This video assumes you are an adult because you had beer in your growler. So use common sense. Don't burn yourself with the scalding hot water. CAUTION. Also use room temp tap water - don't pour boiling hot water into a ice cold glass container. CAUTION. Don't grab a glass jar with bare hands filled with boiling hot water. CAUTION. Can I say CAUTION one more time? CAUTION. Don't do this if you don't do it safely. Use common sense. ONLY do exactly as shown. The key to this method is to pour tap water in the growler immediately after use and keep it full of the tap water until it's time to clean. This method is not recommended if you fail to fill the growler with tap water immediately after use. PLUS it is ONLY if you take a full growler and empty (drink) it within a 4-5 hr span. DO NOT use this method if any other method is used for drinking your beer from the growler. This is ONLY for the quick turn around of your growler from one days usage to clean and ready for the next use.