5.4oz Clear Plastic Rectangular Bottle with Black Cap PKG (6) You get a package of a half-dozen clear-plastic rectangular bottles in the universal aspirin bottle shape and size: 4-1/2" tall x 2-1/2" wide x 1-7/16" thick. Each holds approx 5.4 oz/160ml and has a 7/8" ID mouth and black-plastic, gasketed screw-top.