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:  2-5/8" Diameter.
• Height Dimension: 3-1/4" Height.
• Fits Mini Paper, Foam, Plastic  Cups.
  Works great in Dairy Queen Mini Blizzard cups.
• Fits ideally in paper,foam, plastic.
• Available Color in stock: White.
• 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.