LevGo 19630 Eco-smartFunnel Disposable Paper Lab Funnel, Mini, 6.29 oz, 2.25″ Diameter, 1″ Length (Pack of 25) Review March 20, 2018May 30, 2018 - FilthyMongoose The Disposable Paper lab funnel made of clay coated heavy paper stock. Use with virtually any liquid or powder (hot liquids not recommended). Helps to reduce cross contamination. Naturally biodegradable alternative to disposable paper funnels.