Inner part of the sealing cap tore off within the first week.
I have had 4 G-Fuel shakers total and honestly by the actual looks of the cup this is probably my favorite looking one.  However, the sealing part of the lid started to tear off within the first week I had it.. Unfortunately I was busy with school and it slipped my mind to try to get a replacement. I love the company but have to give it one star due to it breaking within the first week of normal use.  Did not happen with my other G-Fuel Shakers.
Rating: 1 stars