This is an transparent thermoformed blister where the product is visible from all sides. It has two hinged compartments with locking arrangement with keyhole. An both sides printed insert can be trapped in between the two compartments which gives the pack very unique look and it also gives complete protection to the product. An trifold clamshell can also be designed for more attractive pack. Although the cost of clamshell Blister is on the higher side and the development cost is also more than normal Blister Forming Tools.