StepSize - Invisibility - Pointshop items, not working

[Fscreams]

ITEM.Name = 'Step Size'
ITEM.Price = 1500
ITEM.Model = 'models/props_junk/GlassBottle01a.mdl'
ITEM.NoPreview = true

function ITEM:OnEquip(player, modifications)
	player:SetStepSize(250)
end

function ITEM:OnHolster(ply)
	player:SetStepSize(18)end

ITEM.Name = 'Invisible Potion'
ITEM.Price = 1000
ITEM.Model = 'models/props_junk/GlassBottle01a.mdl'
ITEM.NoPreview = true

function ITEM:OnEquip(ply, modifications)
	ply:SetColor(255, 255, 255, 200)
end

function ITEM:OnHolster(ply)
	ply:SetColor(255, 255, 255, 255)
end

Issue with both. Invisible potion makes player purple, and step size just doesn't work at all.