The GR8TR Wood Jar builds on the patented Kannastör GR8TR design and adds an interchangeable and seal-able glass jar system. Designed to be used with any RYOT jar or storage system such as the RYOT Safe Case. Features & Specs. Quick easy access to your herb Wood GR8TR grinder Magnetic closure Tempered Glass Jar High-grade silicone seal Craftsmanship guarantee What's in the Box. 1x - RYOT Wood GR8TR with Mattle Black Jar Body & Beech Top