Just google "food safe tubing" or "FDA Approved tubing", there are probably thousands to choose from, it seems just about every plastic tubing manufacturer has a "food safe" line of products.
If you drill a hole about .005" smaller than the tubing...cut the end of the tubing on a steep angle to get it started through the hole and pull it through with pliers....it creates a firm fit with no gluing. It worked great for the end of small drip bottles too. You can also get silicone tubing for R/C fuel lines at hobby shops...but its much bigger.
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