Chef Rich suggests this Great Plastic Malt or Milk Shake Collar.
This collar extends the height of your cup when making Malts or Shakes.

Key Features

• BRAND NEW.
• Special Durable Food-Grade Plastic used to make these collars.
• 30 Day Money Back Guarantee from Manufacturer.
• They are Dishwasher Safe.
• Top Dimension:   4" Diameter.
• Bottom Dimension:  3" Diameter.
• Height Dimension: 3-1/4" Height.
• One Size Fits 12 to 22 Oz. Paper, Foam, Plastic  Cups.
• Fits ideally in paper,foam, plastic or stainless steel malt or shake  cups.
• Available Color in stock: Red.  (White and Clear are special order colors).
• Made in the USA.

Note: Most Ice Cream Mixer Manufacturers do not recommend the use of stainless steel collars.  They suggest these malt & shake collars over metal collars to avoid sharp edges on the collars and metal fragments in the Malt or Shakes.