MiKeep Hygienic Upside-down Silicon Toothbrush Holder (Penguin) Use silicon upside-down toothbrush holder for hygienic toothbrush use. Heat in microwave oven or boiling water for sanitization. Backside of toothbrush holder has holes for ventilation. Can even hold pens, if desired! Can hold thin to thick toothbrush in your bathroom. Available in 3 designs, penguin, polar bear and seal. Material: 100% silicon / Size: 1.38 x 1.97 x 2.17 in (35x50x55 mm), Weight: 1.09 oz / 31g