Silicone is a flexible material meaning that you can stack it anywhere comfortably without having to worry.  It can also bend to fit into any odd-shaped spaces. It is also a durable material meaning that you do not have to worry about them cracking; breaking or shattering like is the case with glass. If you are dabbing a concentrate, you know how important it is not to waste any of it. You also know how messy it can be. Thankfully, silicone is nonstick and is an ideal vessel to store your concentrates. It does not matter how sticky your concentrate is, it will never stick to the silicone pipe. This makes it easy to scoop it out with a dab tool. It also ensures that there is no wastage