Oster blenders are designed to work with Mason jars. : r

Oster® 2-in-1 Blender System with Blend-n-Go™ Cup and 800-Watt Motor

Oster® Party Blender with XL 8-Cup Jar and Blend-N-Go™ Cup, Grey

Mason Jar Margarita - Miss Allie's Kitchen

You can make everything fresh and delicious with the Oster Pro 500's versatility and performance. The powerful motor impresses any chef as it blends through ice, greens, frozen ingredients and more. Starting up with an extra boost at 900 power watts, it works with blending force to smoothly and continuously create the consistency you need.

Oster Pro 500 Blender, Brushed Nickel

Oster blenders are designed to work with Mason jars. : r/mildlyinteresting

Another Mason Jar Hack w/the Oster Blender: Baby Food Maker

The Best Blender-Food Processor Combos

Mason Jar Blender Smoothies - Mighty Mrs

Oster® Ball Jar Blender

Oster Pro 500 7 Speed 6 Cup Glass Jar Kitchen Countertop Blender

Oster 6-Cup Glass Jar 12-Speed Blender - Bed Bath & Beyond - 10705199

Oster Pro 1200 Blender--UPDATE (SEE 2019 UPDATE)

Oster 16-Speed Blender Plus 3-Cup Food Processor & Reviews