The product unfortunately did not meet my expectations at all. I tried it with icing. Contrary to what the instructions say, you can't pull the icing inside. You have to take off the piston and put it with a spoon from behind, which is very difficult because of the small hole. Silicone is very hard so when used for a long time your hand starts to ache. When the pen is full of icing, it flies continuously without pressing the pen. When there is less of it, it does not want to fly at all. When you press the pen, the piston flies up. You can't make precise decorations with it. In general it was a very unsuccessful purchase.