🧪 Plastic Scientific Tube - 90-pack, 13x100mm dimensions Review

I ordered this for a project for my chemistry students. Each group received a sample of liquid collected at the "murder" scene. They then conducted a series of experiments to determine the identity of the unknown liquid and match it to a list of suspects. This set was so cheap that I could afford to give each group their own whistle. I thought they were disposable but the tubes held up well. At the end of the project they were returned and washed. I reckon we'll get another 2-3 years off the…

I bought two of these electronic component storage kits. I see from the comments that some people are getting kits without enough caps or with only white caps. Both of mine came with extra caps and were at least 18 of each of the 5 colors shown. The first set had three extra caps, while the second set had many extra caps (3 green, 2 red, 2 white, 2 pink, and 2 blue) and *five* extra tubes. The first set had imperfections in the plastic trim that made assembly very difficult, but the second set…

Plastic vials and caps look good. However, the stand is very poorly made. This is basically and fold over here, tuck tab a into slot b. The problem is that one of the structural side pieces (top and bottom) didn't have enough plastic and was between 3/16" and 1/4" short (the end was a bit diagonal). This meant it didn't have an a-tab. The next design just had a vestigial tongue a so it went into the slot but couldn't hold on. One rack is enough for my purposes, I basically just need something…