Rack ống nghiệm cho thùng đá (Tube rack for ice bucket)

I made these racks for my own lab's needs but I thought it might be useful to others as well.

These are flat 'racks' to place on ice for tubes to be placed inside the holes. This helps with organising the tubes into neat grids as well as to keep track of the tubes as from personal experiences, tubes (especially if unlabeled) very easily blends into the ice and disappear from sight even if you're staring right at it. I only hesitate to call these racks because they don't necessarily hold the tubes securely, but rather just holes to place tubes into.

Comes in 2x6 and 3x8 versions which (for me) covers the common amount of samples usually run at a time and will fit any tube with a diameter less than 1.5 cm. Darker colours recommended to provide contrast to the ice.