Conical rubber stopper: ideal for most types of scientific laboratory utensils, such as test tubes, flasks or other laboratory applications. - Laboratory rubber stopper: the rational design provides a sealing effect.
eBay
50ml/100ml/150ml/200ml/250ml Narrow Mouth Glass Erlenmeyer Flask Set15-68mm Silicone Stoppers for Lab Experiment Science Studies
Aliexpress UK
Suits Stopper Types 13 and 13B. Stopper type will be marked on the base of the flask.
eBay
Conical Flask + Stopper. Product: Grounded neck c onical flask + grounded stopper. Conical Flask + Stopper - Boro 3.3 Glass 322417643203. Conical Flask - Boro 3.3 Glass 222402522699. Reagent Bottle (GL45) -Boro 3.3 Glass 322416866176.
eBay
Plastic Portable Universal Pot Kettle Cap Cup Bottle Cover Accessories Travel Vacuum Flask Lid. Set Include : 1Pc Type 2 Vacuum Flask Lid. General Water Bottle 40oz Sleeve Outdoor Cover Carrier Cup Camping Jug Gift New GBP 5.99.
eBay
10Pcs Sealing O-Rings for Bottle Cover Outdoor Travel Bullet Flask Covers. Leak Proof Sealing Stopper Lid Cover for Vacuum Flask Bottle Kettle Cup Part GBP 3.29. Bottle Cover Mug Stopper for Vacuum Flask Cup Lid Pot Kettle Cap 4/7cm Travel GBP 4.99.
eBay
Suits Stopper Types 13 and 13B. Stopper type will be marked on the base of the flask.
eBay
eBay
Vacuum Bottle Cover PP Leakproof Bullet Flask Lid with Silicone Seal Stopper_New GBP 5.99. Vacuum Cup Cover Flask Lid Universal Pot Kettle Cap Drinkware Bullet Out Lids x1 GBP 6.88. Vacuum_Bottle Cover Leakproof Bullet Flask Stopper Vacuum Flask Clip Lid Sealing GBP 6.69.
eBay