It's easy to pour out way too much shampoo from the bottle. Instead of just using it all up and wasting it away, Reddit user evdude23 shares a tip for getting the shampoo back into the bottle where it belongs.
Photo by Kristina D.C. Hoeppner.
If you pour out too much into your hand or towel, it's easy to get back in:
Step 1: Hold bottle pointing straight up, and squeeze only air out, compressing the bottle. Step 2: Place bottle opening into excess shampoo. Step 3: Release the compression in the bottle, sucking up the excess shampoo. Step 4: Lather, rinse and repeat
It's essentially turning your bottle into a syringe, and it works great for sucking up the excess goop that seems to come out no matter how careful you are.