Personalized Funny Chemistry Science Joke You're a 10 pH Scale T-Shirt Drawstring Bag. You're a 10 on the pH scale, and that's the highest compliment you can get! This funny chemistry joke is perfect for anyone who loves pH puns and chemistry humor. Whether you're a chemistry teacher, a student, or just someone who loves to crack science jokes, this design will definitely make you and your friends laugh. A durable and versatile cinch bag built to handle daily use. . With its lightweight design and reinforced corners, this pack is perfect for the gym, travel, or everyday activities.