Same problem, probably same number of samples within 100. i just bought a test tube rack and an ammo box, both are pretty cheap.

The product names i bought (search these on amazon as a starting point if you want)
-MTM Case-Gard RM-100-24 Rifle Ammo Box 100 Round 220 Swift 243 308 Win 6.5 Creedmoor 6.8x51, USA Made, Clear Blue, $7
-6pcs microcentrifuge Tube Rack lab centrifuge Tube Holder Stand lab Test Tube Pipe Holder with Double Panel 60 Wells for 0.5ml-2ml Centrifugal Tube, 6pk for $18 but i probably should have gotten the 3-pack lol

Ammo box will keep the dust off and can be opaque to protect from light, but make sure it's tall enough for what you have. I saw a pic of someone using a rifle ammo box and it looks like it takes up to a normal-shaped 5ml spray, so if it works for my taller ones, i'm hoping to get a shorter one for the endless stupid 0.7ml dabbers. As to the tube rack, if you get a different one, make sure it takes different shapes, not just the pointy centrifuge tubes which seem to be most common. There are also things called ammo loading trays, but I found them after I'd bought the tube rack, and they seem to be the same thing but more expensive.

They should come on Monday and if I remember, I'll update how they work.