These heavy duty 1L PYREX® round bottles can be used for storage as well as mixing and sampling. They include a linerless, one-piece autoclavable orange polypropylene plug seal GL45 threaded cap with a drip-free pouring ring. New glass bead indicates full capacity line. Bottles have permanent white enamel graduations and marking spots. Caution: DO NOT tighten caps immediately after autoclaving as the vacuum resulting from cooling can cause breakage. Assembled Product Weight: 3.2 lb Brand: Pyrex Material: Borosilicate 3.3 Glass Assembled Product Dimensions (L x W x H): 12.00 x 7.10 x 8.80 Inches