Review on IQ Labs Vitamin Powders Plastic by Jamie Northcutt

They looked like shiny metal in the picture so I was a bit surprised that they were more flexible when I received them. However, 2 water bottle sized funnels work really well for my daily morning powder and liquid drinks. I've tried another brand of expandable hoppers in the past that didn't work because the hole at the bottom of the hopper was too small so the powder was clogged and I had to return them, but this brand is still good enough that I they recommend this product.