DO NOT EAT, DRINK OR SMOKE 15 MINUTES BEFORE USING THE TEST. Do not use bubble gum. Prior to the test, ensure you have saliva in your mouth. The alcohol test indicates the blood alcohol content from your saliva.
Do not guess whether or not you are in the state to drive. Keep a Promilless strip in e.g. your wallet, and you will not need to think about it.
Be careful out at water. Sometimes a few beverages are consumed at shore. Promilless belongs to a smart boater’s standard equipment.
The nearest shop may be far away, when you need it. Keep a few Promilless strips stored at the cottage as well.