I need gaskets for sharps containers – The purpose is to contain liquid. These containers have a short life-cycle and are incinerated – Cost is everything. Two different gaskets: Please suggest the lowest cost material. 1. 5.5” square with rounded corners – thickness – maybe 1/8 at the most. It will be pressure fitted. Quantity – 30,000 per month – we would order in larger qty if it will bring the cost down. 2. Elliptical shape 1.6” x 2.5” – thickness – maybe 1/8 at the most. It will be pressure fitted. Quantity – 30,000 per month – we would order in larger qty if it will bring the cost down. Also 1uote 60,000 per month. Thank you.